Update module github.com/cloudflare/circl to v1.6.3 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/cloudflare/circl	v1.1.0 → v1.6.3

---

Improper random reading in CIRCL

CVE-2023-1732 / GHSA-2q89-485c-9j2x

More information

Details

Impact

When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read() returns an error. In rare deployment cases (error thrown by the Read() function), this could lead to a predictable shared secret.

The tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides crypto/rand.Reader, which in the vast majority of cases will always return the right number random bytes. In the cases where it does not, or the user provides a source that does not, the blinding for blindrsa is weak and integrity of the plaintext is not ensured in tkn20.

Patches

The fix was introduced in CIRCL v. 1.3.3

Severity

• CVSS Score: 5.3 / 10 (Medium)
• Vector String: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

References

• https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x
• https://nvd.nist.gov/vuln/detail/CVE-2023-1732
• https://github.com/cloudflare/circl/commit/ff8d91225f8954b4970b6d6382d2e4c78f4a4cf8
• https://github.com/cloudflare/circl/releases/tag/v1.3.3
• https://github.com/advisories/GHSA-2q89-485c-9j2x

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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CIRCL's Kyber: timing side-channel (kyberslash2)

GHSA-9763-4f94-gfch

More information

Details

Impact

On some platforms, when an attacker can time decapsulation of Kyber on forged cipher texts, they could possibly learn (parts of) the secret key.

Does not apply to ephemeral usage, such as when used in the regular way in TLS.

Patches

Patched in 1.3.7.

References

• kyberslash.cr.yp.to

Severity

High

References

• https://github.com/cloudflare/circl/security/advisories/GHSA-9763-4f94-gfch
• https://github.com/cloudflare/circl/commit/75ef91e8a2f438e6ce2b6e620d236add8be1887d
• https://kyberslash.cr.yp.to
• https://github.com/advisories/GHSA-9763-4f94-gfch

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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CIRCL-Fourq: Missing and wrong validation can lead to incorrect results

CVE-2025-8556 / GHSA-2x5j-vhc8-9cwm

More information

Details

Impact

The CIRCL implementation of FourQ fails to validate user-supplied low-order points during Diffie-Hellman key exchange, potentially allowing attackers to force the identity point and compromise session security.

Moreover, there is an incorrect point validation in ScalarMult can lead to incorrect results in the isEqual function and if a point is on the curve.

Patches

Version 1.6.1 (https://github.com/cloudflare/circl/tree/v1.6.1) mitigates the identified issues.

We acknowledge Alon Livne (Botanica Software Labs) for the reported findings.

Severity

• CVSS Score: 3.7 / 10 (Low)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

• https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm
• https://github.com/cloudflare/circl/tree/v1.6.1
• https://nvd.nist.gov/vuln/detail/CVE-2025-8556
• https://access.redhat.com/security/cve/CVE-2025-8556
• https://bugzilla.redhat.com/show_bug.cgi?id=2371624
• https://news.ycombinator.com/item?id=45669593
• https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation
• https://github.com/advisories/GHSA-2x5j-vhc8-9cwm

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

CIRCL has an incorrect calculation in secp384r1 CombinedMult

CVE-2026-1229 / GHSA-q9hv-hpm4-hj6x

More information

Details

The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas.
ECDH and ECDSA signing relying on this curve are not affected.

The bug was fixed in v1.6.3.

Severity

• CVSS Score: 2.9 / 10 (Low)
• Vector String: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/U:Amber

References

• https://github.com/cloudflare/circl/security/advisories/GHSA-q9hv-hpm4-hj6x
• https://nvd.nist.gov/vuln/detail/CVE-2026-1229
• https://github.com/cloudflare/circl/pull/583
• https://github.com/cloudflare/circl/releases/tag/v1.6.3
• https://github.com/advisories/GHSA-q9hv-hpm4-hj6x

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

Release Notes

cloudflare/circl (github.com/cloudflare/circl)

v1.6.3: CIRCL v1.6.3

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CIRCL v1.6.3

Fix a bug on ecc/p384 scalar multiplication.

What's Changed

• sign/mldsa: Check opts for nil value by @​armfazh in #​582
• ecc/p384: Point addition must handle point doubling case. by @​armfazh in #​583
• Release CIRCL v1.6.3 by @​armfazh in #​584

Full Changelog: cloudflare/circl@v1.6.2...v1.6.3

v1.6.2: CIRCL v1.6.2

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CIRCL v1.6.2

• New SLH-DSA, improvements in ML-DSA for arm64.
• Tested compilation on WASM.

What's Changed

• Optimize pairing product computation by moving exponentiations to G1. by @​dfaranha in #​547
• sign: Adding SLH-DSA signature by @​armfazh in #​512
• Update code generators to CIRCL v1.6.1. by @​armfazh in #​548
• ML-DSA: Add preliminary Wycheproof test vectors by @​bwesterb in #​552
• go fmt by @​bwesterb in #​554
• gz-compressing test vectors, use of HexBytes and ReadGzip functions. by @​armfazh in #​555
• group: Removes use of elliptic Marshal and Unmarshal functions. by @​armfazh in #​556
• Support encoding/decoding ML-DSA private keys (as long as they contain seeds) by @​bwesterb in #​559
• Update to golangci-lint v2 by @​bwesterb in #​560
• Preparation for ARM64 Implementation of poly operations for dilithium package. by @​elementrics in #​562
• prepare power2Round for custom implementations in assembly by @​elementrics in #​564
• ARM64 implementation for poly.PackLe16 by @​elementrics in #​563
• add arm64 version of polyMulBy2toD by @​elementrics in #​565
• add arm64 version of polySub by @​elementrics in #​566
• group: add byteLen method for short groups and RandomScalar uses rand.Int by @​armfazh in #​568
• add arm64 version of poly.Add/Sub by @​elementrics in #​572
• group: Adding cryptobyte marshaling to scalars by @​armfazh in #​569
• Bumping up to Go1.25 by @​armfazh in #​574
• ci: Including WASM compilation. by @​armfazh in #​577
• Revert to using package-declared HPKE errors for shortkem instead of standard library errors by @​harshiniwho in #​578
• Release v1.6.2 by @​armfazh in #​579

New Contributors

• @​dfaranha made their first contribution in #​547
• @​elementrics made their first contribution in #​562
• @​harshiniwho made their first contribution in #​578

Full Changelog: cloudflare/circl@v1.6.1...v1.6.2

v1.6.1: CIRCL v1.6.1

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CIRCL v1.6.1

• Fixes some point checks on the FourQ curve.
• Hybrid KEM fails on low-order points.

What's Changed

• kem/hybrid: ensure X25519 hybrids fails with low order points by @​Lekensteyn in #​541
• .github: Use native ARM64 builders instead of QEMU by @​Lekensteyn in #​542
• Fixes several errors on twisted Edwards curves. by @​armfazh in #​545
• Release v1.6.1 by @​armfazh in #​546

Full Changelog: cloudflare/circl@v1.6.0...v1.6.1

v1.6.0: CIRCL v1.6.0

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CIRCL v1.6.0

New!

• Prio3 Verifiable Distributed Aggregation Function (draft-irtf-cfrg-vdaf).
• X-Wing: general-purpose hybrid post-quantum KEM (draft-connolly-cfrg-xwing-kem)

What's Changed

• Add OIDs to ML-DSA by @​bwesterb in #​519
• Adds Prio3 a set of verifiable distributed aggregation functions. by @​armfazh in #​522
• Run semgrep cronjob only in upstream repository. by @​armfazh in #​526
• X-Wing PQ/T hybrid by @​bwesterb in #​471
• ckem: move crypto/elliptic to crypto/ecdh by @​MingLLuo in #​529
• hpke: Update HPKE code to use ecdh stdlib package. by @​armfazh in #​530
• prio3: Adds polynomial multiplication using NTT by @​armfazh in #​532
• Add Prio3 in readme. by @​armfazh in #​527

New Contributors

• @​MingLLuo made their first contribution in #​529

Full Changelog: cloudflare/circl@v1.5.0...v1.6.0

v1.5.0: CIRCL v1.5.0

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CIRCL v1.5.0

New: ML-DSA, Module-Lattice-based Digital Signature Algorithm.

What's Changed

• kem: add X25519MLKEM768 TLS hybrid KEM by @​bwesterb in #​510
• Create semgrep.yml by @​hrushikeshdeshpande in #​514
• repo: Some fixes reported by CodeQL by @​armfazh in #​515
• Add ML-DSA (FIPS204) by @​bwesterb in #​480
• sign/mldsa: Add test for ML-DSA signature verification. by @​armfazh in #​517
• Release v1.5.0 by @​armfazh in #​518

New Contributors

• @​hrushikeshdeshpande made their first contribution in #​514

Full Changelog: cloudflare/circl@v1.4.0...v1.5.0

v1.4.0: CIRCL v1.4.0

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CIRCL v1.4.0

Changes

New: ML-KEM compatible with FIPS-203.

Commit History

• eddilithium3: fix typos by @​bwesterb in #​503
• Add ML-KEM (FIPS 203). by @​bwesterb in #​470
• Add ML-KEM decapsulation key check. by @​bwesterb in #​507
• Preparing for release v1.4.0 by @​armfazh in #​508

Full Changelog: cloudflare/circl@v1.3.9...v1.4.0

v1.3.9: CIRCL v1.3.9

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CIRCL v1.3.9

Changes:

• Fix bug on BLS12381 decoding elements.

Commit History

• dilithium: fix typo by @​bwesterb in #​498
• bls12381: Detects invalid prefix in G1 and G2 serialized elements by @​armfazh in #​500
• Preparing CIRCL release v1.3.9 by @​armfazh in #​501

Full Changelog: cloudflare/circl@v1.3.8...v1.3.9

v1.3.8: CIRCL v1.3.8

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CIRCL v1.3.8

New

• BLS Signatures on top of BLS12-381.
• Adopt faster squaring in pairings.
• BlindRSA compliant with RFC9474.
• (Verifiable) Secret Sharing compatible with the Group interface (elliptic curves).

Notice

• Update on cpabe/tkn20 ciphertexts, read more at https://github.com/cloudflare/circl/wiki/tkn20-Ciphertext-Format-(v1.3.8)

What's Changed

• Implement Granger-Scott faster squaring in the cyclotomic subgroup. by @​armfazh in #​449
• Updates avo and CIRCL's own dependency. by @​armfazh in #​474
• Updating documentation for OPRF package. by @​armfazh in #​475
• group: removes order method from group interface by @​armfazh in #​356
• zk/dleq: Adding DLEQ proofs for Qn, the subgroup of squares in (Z/nZ)* by @​armfazh in #​451
• Reduce x/crypto and x/sys versions to match Go 1.21 by @​Lekensteyn in #​476
• Bump GitHub Actions versions and use Go 1.22 and 1.21 by @​Lekensteyn in #​477
• Adding rule for constant values by @​armfazh in #​478
• Add BLS signatures over BLS12-381 by @​armfazh in #​446
• group: Implements Shamir and Feldman secret sharing. by @​armfazh in #​348
• blindrsa: add support for all variants of RFC9474 by @​armfazh in #​479
• Explicitly installs Go with version before CodeQL analysis. by @​armfazh in #​481
• Bumps golangci-lint action by @​armfazh in #​485
• ecc/bls12381: Ensures pairing operations don't overwrite their input by @​armfazh in #​494
• Align to the purego build tag, removing noasm build tag by @​mattyclarkson in #​492
• cpabe: Serializing ciphertext with 32-bit prefixes. by @​armfazh in #​490

New Contributors

• @​mattyclarkson made their first contribution in #​492

Full Changelog: cloudflare/circl@v1.3.7...v1.3.8

v1.3.7: CIRCL v1.3.7

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CIRCL v1.3.7

What's Changed

• build(deps): bump golang.org/x/crypto from 0.3.1-0.20221117191849-2c476679df9a to 0.17.0 by @​dependabot in #​467
• kyber: remove division by q in ciphertext compression by @​bwesterb in #​468
• Releasing CIRCL v1.3.7 by @​armfazh in #​469

New Contributors

• @​dependabot made their first contribution in #​467

Full Changelog: cloudflare/circl@v1.3.6...v1.3.7

v1.3.6: CIRCL v1.3.6

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CIRCL v1.3.6

What's Changed

• internal: add TurboShake{128,256} by @​bwesterb in #​430
• Kangaroo12 draft -10 by @​bwesterb in #​431
• Add K12 as XOF by @​bwesterb in #​437
• xof/k12: Fix a typo in the package documentation by @​cjpatton in #​438
• Set CIRCL version for generated assembler code. by @​armfazh in #​440
• Add tkn20 benchmarks by @​tanyav2 in #​442
• Add partially blind RSA implementation by @​chris-wood in #​445
• Update doc.go by @​nadimkobeissi in #​447
• tss/rsa: key generation for threshold RSA (safe primes) by @​armfazh in #​450
• Bumping Go version for CI jobs. by @​armfazh in #​457
• Spelling by @​jsoref in #​456
• blindrsa: updating blindrsa to be compliant with RFC9474 by @​armfazh in #​464
• Releasing CIRCL v1.3.6 by @​armfazh in #​465

New Contributors

• @​nadimkobeissi made their first contribution in #​447
• @​jsoref made their first contribution in #​456

Full Changelog: cloudflare/circl@v1.3.3...v1.3.6

v1.3.5

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v1.3.4

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v1.3.3: CIRCL v1.3.3

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New Features

• ASCON light-weight authenticated encryption.
• Hybrid KEM for HPKE based on Kyber and X25519.
• CIRCL can be compiled both as static and dynamic linking modes.

Security

• Fixes error-handling on rand readers.

What's Changed

• Use untyped consts for Kyber params by @​tmthrgd in #​398
• zk/dl: adds prefixed labels and updates nomenclature. by @​armfazh in #​396
• Bumping Go version. by @​armfazh in #​399
• kem: add P-256 + Kyber768Draft00 hybrid by @​bwesterb in #​402
• ckem: pass xof to elliptic.GenerateKey directly by @​bwesterb in #​403
• Adding Ascon, an AEAD lightweight cipher. by @​armfazh in #​400
• Add Ascon-80pq to cipher\ascon by @​dhcgn in #​404
• ascon: update formulas and check for API compatibility by @​armfazh in #​406
• all: enables dynamic linking, removes R15 is clobbered by @​armfazh in #​407
• ascon: Removes table of constants. by @​armfazh in #​408
• tkn20: prevent panics on key gen errors by @​tmthrgd in #​409
• expander,tkn20: remove superfluous Reset calls by @​tmthrgd in #​410
• Updating stdlib crypto library. by @​armfazh in #​413
• Reduce x/crypto and x/sys versions to match Go 1.20 by @​Lekensteyn in #​414
• Make ascon cipher go routine safe by @​enj in #​416
• tkn20,kyber,x25519,x448: plug constant-time leaks by @​tmthrgd in #​411
• Check for crypto/rand errors and ReadFull io.Readers by @​bwesterb in #​417
• Fix encapsulation seed size by @​chris-wood in #​419
• Add X25519Kyber768Draft00 experimental HPKE KEM by @​chris-wood in #​421
• hpke: Adding NonceSize function to AEAD. by @​armfazh in #​424
• hpke: Address always nil parameter. by @​armfazh in #​425
• hpke: update and move xyber768d00 test vectors by @​bwesterb in #​426
• hpke: fix encapsulation seed in test for xyber by @​bwesterb in #​428
• Remove scalar sha3 amd64 assembly by @​bwesterb in #​429
• Add HPKE benchmarks by @​chris-wood in #​434

New Contributors

• @​tmthrgd made their first contribution in #​398
• @​dhcgn made their first contribution in #​404
• @​Lekensteyn made their first contribution in #​414
• @​enj made their first contribution in #​416

Full Changelog: cloudflare/circl@v1.3.2...v1.3.3

v1.3.2: CIRCL v1.3.2

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What's Changed

• oprf: Updating test vectors for VOPRF rc-rfc. by @​armfazh in #​388
• abe: Make golden files for cpabe. by @​armfazh in #​392
• abe: Improve test clarity by @​tanyav2 in #​393
• tkn20: change seed size for MAC key from 128->448 bits in accordance … by @​tanyav2 in #​394
• tss/rsa: Fixes RSA signature size. by @​armfazh in #​395
• Releasing v1.3.2 by @​armfazh in #​397

Full Changelog: cloudflare/circl@v1.3.1...v1.3.2

v1.3.1: CIRCL v1.3.1

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What's Changed

• tkn20: Don't build outdated source file by @​bwesterb in #​386

Full Changelog: cloudflare/circl@v1.3.0...v1.3.1

v1.3.0: CIRCL v1.3.0

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New Features

• CPABE: A ciphertext-policy attribute-based encryption based on TKN19 paper.
• Blind RSA signatures.
• Schnorr and DLEQ proofs of knowledge on elliptic curve groups.

Security

• SIDH/SIKE was deprecated. This applies to dh and kem packages.

What's Changed

• kem/hybrid: Remove restriction on seed sizes by @​bwesterb in #​342
• Updates OPRF test vectors to draft v10. by @​armfazh in #​344
• kem: add Kyber768X25519 by @​bwesterb in #​346
• kyber/ntt: fix documentation typos by @​bwesterb in #​347
• Use plain X{25519,448} for PQ hybrids instead of HPKE by @​bwesterb in #​351
• Add benchmarks for all OPRF suites (including a new Ristretto255 suite) by @​chris-wood in #​350
• chore: bump macos runner version by @​renbaoshuo in #​352
• group: adds a method to retrieve the group. by @​armfazh in #​354
• group: adds conditional move and select to group. by @​armfazh in #​353
• group: document group interface by @​armfazh in #​355
• sidh: deprecates sidh and sike packages. by @​armfazh in #​359
• Removes dependency on io/ioutil as is deprecated. by @​armfazh in #​361
• Formatting files with new go1.19 fmt tool. by @​armfazh in #​362
• tests: fixes ci to fail fast by @​armfazh in #​363
• math: adds polynomials and Lagrange polynomials. by @​armfazh in #​357
• dilithium: fix typo by @​bwesterb in #​366
• Bumping up to go 1.19 version. by @​armfazh in #​368
• Bumping linter to v1.49 by @​armfazh in #​369
• sidh: updates multiplication and reduction mod p434 by @​armfazh in #​235
• dleq: Moves dleq to new top-level zero-knowledge package. by @​armfazh in #​372
• Add Scalar/SetBigInt function by @​chris-wood in #​377
• Add deterministic blind RSA verifier by @​chris-wood in #​379
• Adding CodeQL analyzer by @​armfazh in #​380
• Add TKN20 ciphertext-policy attribute based encryption scheme by @​tanyav2 in #​381
• Updating readme for v1.3.0. by @​armfazh in #​382

New Contributors

• @​renbaoshuo made their first contribution in #​352
• @​jbis9051 made their first contribution in #​364
• @​tanyav2 made their first contribution in #​381

Full Changelog: cloudflare/circl@v1.2.0...v1.3.0

v1.2.0: CIRCL v1.2.0

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Security

• Included countermeasures against Hertzbleed attack.

What's Changed

• group: add SetUint64 method to Group.Scalar. by @​armfazh in #​301
• group/ristretto255: use SetUint64 instead of SetBigInt by @​bwesterb in #​302
• oprf: updates test vectors to draft voprf-v8 by @​armfazh in #​300
• Move expander out of the group package. by @​armfazh in #​304
• group: adds a function for sampling non-zero scalars. by @​armfazh in #​305
• Add blind RSA protocol support by @​chris-wood in #​308
• Verify the signatures for sanity's sake by @​chris-wood in #​309
• bls12: Adding hashing to G2 by @​armfazh in #​299
• Pad blind RSA protocol messages to fixed modulus width by @​chris-wood in #​310
• Performs modular reduction for all scalars. by @​armfazh in #​315
• Added implementation of FrodoKEM-640-SHAKE-CCA. by @​xvzcf in #​311
• Expose randomly generated values for Blind RSA (salt and blind) by @​chris-wood in #​320
• oprf: update API and test vectors to draft v09 by @​armfazh in #​319
• Export Group and Hash for each OPRF suite by @​chris-wood in #​323
• Add deterministic Blind function by @​chris-wood in #​324
• Add functions to retrieve params of a Suite. by @​armfazh in #​325
• all: formatting code with golangci-lint by @​armfazh in #​321
• group: adds Set/Copy methods for group elements and scalars by @​armfazh in #​326
• Enable Ristretto255 for OPRFs. by @​armfazh in #​322
• Bumping up to Go1.18 by @​armfazh in #​327
• Refactoring FrodoKEM implementation. by @​xvzcf in #​328
• Bump golangci-lint to v1.45 and format files with gofumpt by @​armfazh in #​333
• Update version of github actions by @​armfazh in #​332
• Update with latest RSA from go stdlib by @​armfazh in #​331
• Moving golangci-lint to v1.46 by @​armfazh in #​334
• Wait for amd64 job succeds to run other jobs. by @​armfazh in #​337
• sike mitigation with test cases by @​zhdllwyc in #​336
• Formatting auto-generated code. by @​armfazh in #​338
• Format templates using gtfmt tool by @​armfazh in #​339
• Format generated files. by @​armfazh in #​340

New Contributors

• @​xvzcf made their first contribution in #​311
• @​zhdllwyc made their first contribution in #​336

Full Changelog: cloudflare/circl@v1.1.0...v1.2.0

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[renovate]

ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 3 additional dependencies were updated
• The go directive was updated for compatibility reasons

Details:

Package	Change
go	1.19 -> 1.22.0
golang.org/x/net	v0.17.0 -> v0.21.0
golang.org/x/crypto	v0.14.0 -> v0.30.0
golang.org/x/sys	v0.13.0 -> v0.28.0