Vulnerability Description
Atlantis is a self-hosted golang application that listens for Terraform pull request events via webhooks. From 0.19.8 until 0.45.0, Atlantis does not consistently validate user-controlled workspace values supplied through accepted repository-level atlantis.yaml configuration or authenticated /api/plan input before joining them into local workspace paths. Traversal segments can escape the intended per-pull workspace directory and cause clone preparation or other working-directory code paths to call os.RemoveAll, os.MkdirAll, or related filesystem operations on out-of-bounds directories before Terraform rejects the invalid workspace name. This can create, delete, or reuse writable paths with the privileges of the Atlantis process, causing integrity loss or denial of service. This issue is fixed in version 0.45.0.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/runatlantis/atlantis/commit/ea4e4ceebf8b387d015fff7ed8a7fcca3
- https://github.com/runatlantis/atlantis/pull/6254
- https://github.com/runatlantis/atlantis/releases/tag/v0.45.0
- https://github.com/runatlantis/atlantis/security/advisories/GHSA-26w5-6g95-gj28
FAQ
What is CVE-2026-64679?
CVE-2026-64679 is a vulnerability with a CVSS score of 8.1 (HIGH). Atlantis is a self-hosted golang application that listens for Terraform pull request events via webhooks. From 0.19.8 until 0.45.0, Atlantis does not consistently validate user-controlled workspace va...
How severe is CVE-2026-64679?
CVE-2026-64679 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64679?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.