High 7.8Published Jun 23, 2026

CVE-2026-12957Arbitrary Code Execution in Language Servers for AWS

Updated under an hour ago (Oct 27, 2026, 2:30 AM ET)

Does this affect you?

It affects Amazon Web Services Language Servers for AWS. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Amazon Web Services Language Servers for AWS

Exploited in the last 30 days

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: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-732
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: AMZN
NVD analysis: Awaiting Analysis
Record last updated: Jun 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Amazon Web Services Language Servers for AWS amazon_web_services:language_servers_for_aws (from the name)	before 1.65.0	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.