high7.8
CVE-2026-12957
Improper trust boundary enforcement in Language Servers for AWS before version 1.65.0 on all supported platforms may allow a for arbitrary code execution.
Impact
Improper trust boundary enforcement in Language Servers for AWS before version 1.65.0 on all supported platforms may allow a for arbitrary code execution. If a local user opens a maliciously crafted workspace, any commands within the project configuration files may be automatically executed. This issue requires the user to trust the workspace when prompted. To remediate this issue, users should upgrade to Language Servers for AWS version 1.65.0 or higher.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @aws/lsp-codewhisperer | < 0.0.113 | 0.0.113 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-xhcr-j4j9-3gh7
- https://github.com/aws/language-servers/security/advisories/GHSA-xhcr-j4j9-3gh7
- https://nvd.nist.gov/vuln/detail/CVE-2026-12957
- https://github.com/Amazon-Q-Developer/language-servers/pull/2708
- https://github.com/Amazon-Q-Developer/language-servers/pull/2711
- https://github.com/Amazon-Q-Developer/language-servers/commit/7b8595a4e638562f79d5f71dcf22b0c700490458
- https://github.com/Amazon-Q-Developer/language-servers/commit/f5aa1a3b25aa38bfe8dd0e830b5839e1cea1d410
- https://aws.amazon.com/security/security-bulletins/2026-047-aws
- https://github.com/Amazon-Q-Developer/language-servers/releases/tag/agentic-rc-1.65.0
- https://aws.amazon.com/security/security-bulletins/2026-047-aws/