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CVE-2026-12958 is a high-severity arbitrary file write vulnerability in Language Servers for AWS caused by missing validation of symbolic links. When a user opens a maliciously crafted workspace containing a symlink located inside the workspace that resolves to a path outside the workspace trust boundary, the language server may follow the symlink and write to the external target. This breaks the intended workspace isolation model and allows file operations to escape the trusted project scope. The issue affects Language Servers for AWS versions prior to 1.69.0 and is associated with Amazon Q Developer integrations that rely on the language server component.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A symlink-based file write vulnerability in Amazon Q Developer/AWS Language Server that can let a malicious repository cause writes outside the approved workspace, potentially to sensitive files such as SSH authorized_keys.
A symlink-abuse vulnerability in AWS Language Servers / Amazon Q Developer that can let a malicious repository trick the AI coding assistant into writing to files outside the intended workspace, such as ~/.ssh/authorized_keys.
The Amazon Q Developer instance of the GhostApproval issue, where symlink handling allowed writes outside the intended workspace before meaningful user authorization, enabling sandbox escape and potential RCE/persistence.
Vendor-assigned CVE for the GhostApproval-related flaw fixed by AWS in Amazon Q Developer language server version 1.69.0.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.