CVE-2026-64679 runatlantis CVE debrief

Who should care

Users of Atlantis versions 0.19.8 to 0.45.0 should be aware of this vulnerability and take necessary actions to mitigate it. Affected operators, platforms, and security teams should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Technical summary

The vulnerability exists due to inconsistent validation of user-controlled workspace values in Atlantis versions 0.19.8 to 0.45.0. This allows an attacker to perform a path traversal attack, potentially leading to integrity loss or denial of service. The issue is fixed in version 0.45.0. Affected operators should review compensating controls for exposed systems while remediation is scheduled and verified.

Defensive priority

High priority due to potential for integrity loss and denial of service

Recommended defensive actions

• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Inventory and verify Atlantis version

Evidence notes

Evidence is limited; primary official records indicate a path traversal vulnerability in Atlantis versions 0.19.8 to 0.45.0. The issue is fixed in version 0.45.0. To verify, defenders should review the official advisory and CVE record for affected scope, severity, and vendor guidance. They should also check relevant monitoring, detection, and logs for exposed assets that need extra review.

Official resources