CVE-2026-76234: Celabshq Libcrux-Ecdh

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Celabshq Libcrux-Ecdh: before 0.0.6 (fixed in 0.0.6)
• Celabshq Libcrux-ED25519: before 0.0.6 (fixed in 0.0.6)
• Celabshq Libcrux-Psq: before 0.0.7 (fixed in 0.0.7)

Published 2026-08-19. Last modified 2026-09-24.