chore(deps): 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	v1.6.0 → v1.6.3

GitHub Vulnerability Alerts

CVE-2025-8556

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.

CVE-2026-1229

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.

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Release Notes

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

v1.6.3: CIRCL v1.6.3

Compare Source

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

Compare Source

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

Compare Source

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

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