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TI-2026-53339 Aliases CVE-2026-76234GHSA-xp2x-phr3-m4r9

libcrux before 0.0.6 Cryptographic Implementation Bug Fixes

Priority MEDIUM 43CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-347.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00307 23rd percentileScored 2026-11-07
Fix Fixed libcrux-ecdh (celabshq): 0.0.6libcrux-ed25519 (celabshq): 0.0.6+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
celabshqlibcrux-ecdhbefore 0.0.60.0.6Patch availableCNA
celabshqlibcrux-ed25519before 0.0.60.0.6Patch availableCNA
celabshqlibcrux-psqbefore 0.0.70.0.7Patch availableCNA
  • libcrux-ecdh Vendorcelabshq Affected before 0.0.6 Fixed in 0.0.6 Patch available CNA
  • libcrux-ed25519 Vendorcelabshq Affected before 0.0.6 Fixed in 0.0.6 Patch available CNA
  • libcrux-psq Vendorcelabshq Affected before 0.0.7 Fixed in 0.0.7 Patch available CNA

Remediation

  • Fix · CNA libcrux-ecdh (celabshq) Fixed in 0.0.6
  • Fix · CNA libcrux-ed25519 (celabshq) Fixed in 0.0.6
  • Fix · CNA libcrux-psq (celabshq) Fixed in 0.0.7

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76234
  2. 2026-10-03 Alias added: GHSA-xp2x-phr3-m4r9
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat

References

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences