libcrux before 0.0.6 Cryptographic Implementation Bug Fixes (CVE-2026-76234) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-76234

libcrux before 0.0.6 Cryptographic Implementation Bug Fixes

Answer in brief

CVE-2026-76234 records a Unknown severity vulnerability in libcrux before 0.0.6 Cryptographic Implementation Bug Fixes. The current sources do not mark it as known exploited. The current feed maps celabshq/libcrux (generic), celabshq/libcrux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 19, 2026Updated Aug 19, 2026Source checked Aug 19, 2026First seen by HOL Aug 19, 2026Material review Aug 19, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps celabshq/libcrux (generic), celabshq/libcrux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
celabshq/libcruxgeneric	>=0 <0.0.6	0.0.6
celabshq/libcruxgeneric	>=0 <0.0.7	0.0.7

Recommended response

Check inventory. Check lockfiles and deployed manifests for celabshq/libcrux, celabshq/libcrux.
Review the reported fix. Update celabshq/libcrux to 0.0.6; celabshq/libcrux to 0.0.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 19, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.