CVE-2026-12958

Arbitrary file write in Language Servers for AWS

Published Jun 23, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
Missing symlink validation in Language Servers for AWS may allow an arbitrary file write outside of the workspace trust boundary. This may occur when a local user opens a workspace with a maliciously crafted symlink that resolves to a file path outside the workspace trust boundary.



To remediate this issue, users should upgrade to version 1.69.0 or higher.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-6v3r-4p5c-mrp5 Language Servers for AWS vulnerable to arbitrary file write
History
Type Values Removed Values Added
First Time appeared Amazon
Amazon language Servers For Aws
Vendors & Products Amazon
Amazon language Servers For Aws
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Missing symlink validation in Language Servers for AWS may allow an arbitrary file write outside of the workspace trust boundary. This may occur when a local user opens a workspace with a maliciously crafted symlink that resolves to a file path outside the workspace trust boundary. To remediate this issue, users should upgrade to version 1.69.0 or higher.
Title Arbitrary file write in Language Servers for AWS
Weaknesses CWE-61
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Jun 23, 2026, 5:56 PM
Reserved
Jun 23, 2026, 1:55 AM
Status
Awaiting Analysis
Published
Jun 23, 2026, 5:16 PM
Modified
Oct 26, 2026, 11:10 AM