CVE-2026-12957

Arbitrary Code Execution in Language Servers for AWS

CVSS 8.5 HIGHEPSS 0.1%CWE-732

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.5EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

23 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

Amazon Web Services · Language Servers for AWS

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References

https://aws.amazon.com/security/security-bulletins/2026-047-aws/https://github.com/aws/language-servers/security/advisories/GHSA-xhcr-j4j9-3gh7