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CVE-2026-76234— libcrux before 0.0.6 Cryptographic Implementation Bug Fixes

CVSS 7.5 · High EPSS 0.22% · P13

Possible ATT&CK Techniques 1AI

T1552.005 · Cloud Instance Metadata API

Affected Version Matrix 6

VendorProductVersion RangeStatus
celabshqlibcrux-ecdh< 0.0.6affected
0.0.6unaffected
celabshqlibcrux-ed25519< 0.0.6affected
0.0.6unaffected
celabshqlibcrux-psq< 0.0.7affected
0.0.7unaffected
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I. Basic Information for CVE-2026-76234

Vulnerability Information
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Vulnerability Title
libcrux before 0.0.6 Cryptographic Implementation Bug Fixes
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
celabshqlibcrux-ecdh 0 ~ 0.0.6 -
celabshqlibcrux-ed25519 0 ~ 0.0.6 -
celabshqlibcrux-psq 0 ~ 0.0.7 -

II. Public POCs for CVE-2026-76234

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8024 chars
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III. Intelligence Information for CVE-2026-76234

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Vendor Advisories for CVE-2026-76234 (1)

Other References for CVE-2026-76234 (1)

IV. Related Vulnerabilities

Same weakness: CWE-347

V. Comments for CVE-2026-76234

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