Language Servers for AWS Vulnerable to Arbitrary Code Execution
High-risk advisory
CVE-2026-12957
Summary
Language Servers for AWS Vulnerable to Arbitrary Code Execution
Why it matters
GitHub has published a reviewed security advisory for @aws/lsp-codewhisperer. Prioritize it with other application dependency updates, especially because EPSS places it in the 6% percentile.
Operator check
Check whether @aws/lsp-codewhisperer is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 8.5. EPSS probability: 0.2%; percentile: 6%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.