AWS-LC has Timing Side-Channel in AES-CCM Tag Verification

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.011, the 65th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:17 UTC First seen by agentprime
2. 31 Oct 2026, 15:17 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-65p9-r9h6-22vj
• OSV: GHSA-65p9-r9h6-22vj
• github.com/aws/aws-lc-rs/security/advisories/GHSA-65p9-r9h6-22vj
• github.com/aws/aws-lc/security/advisories/GHSA-frmv-5gcm-jwxh
• nvd.nist.gov/vuln/detail/CVE-2026-3337
• aws.amazon.com/security/security-bulletins/2026-005-AWS
• github.com/aws/aws-lc-rs
• rustsec.org/advisories/RUSTSEC-2026-0043.html
• rustsec.org/advisories/RUSTSEC-2026-0045.html

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.