CVE-2026-76234
libcrux before 0.0.6 Cryptographic Implementation Bug Fixes
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 19, 2026
- Updated
- Aug 21, 2026
- Reserved
- Aug 19, 2026
Description
libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-psq before 0.0.7, contain cryptographic implementation bugs. libcrux-ecdh did not properly check length and clamping during X25519 secret validation (and had a broken clamping check for imported X25519 secret keys); libcrux-ed25519 performed a duplicated clamping step during key generation; and libcrux-psq panicked instead of propagating an AEADError. These were fixed in the respective patched releases.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-347 Improper Verification of Cryptographic Signature
Affected Products
| Product | Versions |
|---|---|
libcrux-ecdhcelabshq |
|
libcrux-ed25519celabshq |
|
libcrux-psqcelabshq |
|
References
- GitHub Security Advisory (GHSA-435g-fcv3-8j26)vendor-advisory
- VulnCheck Advisory: libcrux before 0.0.6 Cryptographic Implementation Bug Fixesthird-party-advisory
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