CVE-2026-12957High▾ TwilightLanguage Servers for AWS Vulnerable to Arbitrary Code Execution
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.2%
Language Servers for AWS (the aws/language-servers project) provide the underlying language-server runtime that powers Amazon Q Developer's AI coding assistance across its IDE plugins (Visual Studio Code, JetBrains, Eclipse, and Visual Studio).
Improper trust boundary enforcement in Language Servers for AWS may allow for arbitrary code execution. If a local user opens a maliciously crafted workspace, any commands within the project configuration files may be automatically executed.
When a local user opens a maliciously crafted workspace and trusts it when prompted, commands defined in the workspace's project-level configuration files may be executed automatically, resulting in arbitrary code execution on the user's host.
This issue is triggered when a user opens a workspace, trusts it, and the agent subsequently executes commands defined in the project-level configuration files.
Impacted versions: Language Servers for AWS version <1.65.0.
This issue has been addressed in Language Servers for AWS version 1.65.0. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.
No workarounds are available.
If you have any questions or comments about this advisory, AWS Security asks that you contact them via their vulnerability reporting page or directly via email to [email protected]. Please do not create a public GitHub issue.
AWS Security would like to thank Wiz and Maor Dokhanian for collaborating on this issue through the coordinated vulnerability disclosure process.
@aws/lsp-codewhisperer < 0.0.113Upgrade to a patched release:
@aws/lsp-codewhisperer 0.0.113Connected by shared product, vendor, weakness, or advisory.
CVE-2026-12958High· 7.8Language Servers for AWS vulnerable to arbitrary file write
CVE-2018-13374Medium· 4.3A Improper Access Control in Fortinet FortiOS 6.0.2, 5.6.7 and before, FortiADC 6.1.0, 6.0.0 to 6.0.1, 5.4.0 to 5.4.4 allows attacker to obtain the LDAP server login credentials configured in FortiGate via pointing a LDAP server connecti…
CVE-2026-11393High· 9.0AgentCore CLI Bedrock Agent Import Vulnerable to Code Injection via Improper Triple-Quote Escaping
CVE-2026-10840High· 7.1A flaw was found in the OpenShift Pipelines operator
CVE-2026-0775High· 7.0npm cli Incorrect Permission Assignment Local Privilege Escalation Vulnerability
CVE-2026-96883High· 8.8pgcollection is an open source extension to PostgreSQL