Security issues in AWS KMS and AWS Encryption SDKs: in-band protocol negotiation and robustness

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 0.0040, the 34th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 14:18 UTC First seen by agentprime
2. 31 Oct 2026, 14:18 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-wqgp-vphw-hphf
• OSV: GHSA-wqgp-vphw-hphf
• github.com/google/security-research/security/advisories/GHSA-wqgp-vphw-hphf
• nvd.nist.gov/vuln/detail/CVE-2020-8897
• aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment
• github.com/pypa/advisory-database/tree/main/vulns/aws-encryption-sdk/PYSEC-2020-261.yaml

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.