🛡️ RUSTSEC-2026-0209 — libcrux-aesgcm

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

AES-GCM did not enforce limits on AAD length

NIST Special Publication 800-38D specifies that the bit length of the

AAD shall not exceed 2^64 - 1 bits. The implementation of AES-GCM in

libcrux-aesgcm neither enforced this limit for encryption nor for

decryption.

Impact

Use of AES-GCM with AAD of length exceeding the prescribed maximum

length degrades the authentication security of the GCM tag.

Mitigation

Starting from version 0.0.9 (published as [email protected]),

limits on the length of the AAD input are enforced, so overlong AAD

inputs result in an error on encryption and decryption.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity low, availability none.

Affected software

RUSTSEC-2026-0209 is recorded against 1 package.

  • libcrux-aesgcm

Timeline and source

Published on 9 June 2026 and last revised on 17 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

crates.io (Package)
rustsec.org (Advisory)
github.com (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-06-09
Updated 2026-08-12
Modified 2026-07-17
Fix URL N/A

Affected Packages

Software From version Fixed in
libcrux-aesgcm — —

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