Vulnerability in Amazon Aws-lc-fips-sys
CVE-2026-3337
Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis. The impacted implementations are through the EVP CIPHER API: EVP_aes…
EPSS: 0.011 (61.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Amazon Aws-lc-fips-sys
- Amazon Aws-lc-sys
- Amazon Aws_libcrypto
- Aws Aws-lc — versions 1.21.0
- Aws Aws-lc-fips — versions 3.0.0
Weakness classification (CWE)
References
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory, Vendor Advisory)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (Release Notes, patch)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (Vendor Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-3337?
- CVE-2026-3337 is a medium-severity vulnerability in Amazon Aws-lc-fips-sys, classified under CWE-208. CVSS score: 5.9/10. Published 2026-03-02.
- How severe is CVE-2026-3337?
- Medium severity. CVSS v3 base score is 5.9 out of 10.