CVE-2026-76234CWE-347

CVE-2026-76234

High · published August 19, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
22.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · 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
EPSS
0.00307 · 22.3th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-08-19T18:17Z
References (2)
https://github.com/celabshq/libcrux/security/advisories/GHSA-435g-fcv3-8j26 · [email protected]https://www.vulncheck.com/advisories/libcrux-before-cryptographic-implementation-bug-fixes · [email protected]
EPSS history
Timeline
  • 19 AUG 14:02Z
    libcrux before 0.0.6 Cryptographic Implementation Bug Fixes
    cvelistv5