What is CVE-2026-12957?

CVE-2026-12957 is a high-severity vulnerability in Amazon Web Services Language Servers For Aws, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.8/10. Published 2026-06-23.

How severe is CVE-2026-12957?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Amazon Web Services Language Servers For Aws

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. If a local user opens a maliciously crafted workspace, any commands within the proje…

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Amazon Web Services Language Servers For Aws — versions 0

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)

Frequently asked questions

What is CVE-2026-12957?: CVE-2026-12957 is a high-severity vulnerability in Amazon Web Services Language Servers For Aws, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.8/10. Published 2026-06-23.
How severe is CVE-2026-12957?: High severity. CVSS v3 base score is 7.8 out of 10.