What’s Vulnerable › Vulnerabilities

CVE-2026-12958: Arbitrary file write in Language Servers for AWS

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-23 · updated 2026-10-26
• Weakness: CWE-61

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.

Affected products

• Amazon Web Services Language Servers for AWS: before 1.69.0 — fixed in 1.69.0

How to fix

Upgrade to a fixed version: Amazon Web Services Language Servers for AWS 1.69.0. Check the vendor advisory for mitigations.

References

• https://aws.amazon.com/security/security-bulletins/2026-047-aws/
• https://github.com/aws/language-servers/security/advisories/GHSA-6v3r-4p5c-mrp5

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