Vulnerability Description
Ouroboros is a local-first runtime for AI coding agents that records their actions and applies user-defined policies to constrain behavior. In versions prior to 0.39.0, if a user clones a malicious repository and runs Ouroboros commands within that directory, it can lead to arbitrary code execution and potential system takeover. The vulnerability stems from Ouroboros loading the .env file from the current working directory. Execution-affecting environment variables such as OUROBOROS_CLI_PATH, OPENCODE_CLI_PATH, and other backend selectors are accepted directly from this local .env. An attacker can include a malicious script in the repository and point the CLI path variable to it (e.g., OUROBOROS_CLI_PATH=./malicious_script.sh). When the user executes a command like ouroboros init or any command that instantiates the adapter, the malicious script is executed instead of the intended CLI. This issue has been fixed in version 0.39.0.
Related Weaknesses (CWE)
References
- https://github.com/Q00/ouroboros/commit/4e70b760b4eb157469b58645339ba831f6513d37
- https://github.com/Q00/ouroboros/pull/1078
- https://github.com/Q00/ouroboros/security/advisories/GHSA-c4m7-2gwp-vw76
FAQ
What is CVE-2026-47211?
CVE-2026-47211 is a documented vulnerability. Ouroboros is a local-first runtime for AI coding agents that records their actions and applies user-defined policies to constrain behavior. In versions prior to 0.39.0, if a user clones a malicious re...
How severe is CVE-2026-47211?
CVSS scoring is not yet available for CVE-2026-47211. Check NVD for updates.
Is there a patch for CVE-2026-47211?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.