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Vulnerability record · CVE-2026-64679 · published 21 August 2026

CVE-2026-64679: Path traversal vulnerability

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.

8.1 CVSS 3.1 High EPSS 0.80% · top 45.3% CWE-22 · Path traversalCWE-73 · CWE-73 Deferred
8.1CVSS 3.1 base score
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
9 Sep 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

References

LinkTags
https://github.com/runatlantis/atlantis/commit/ea4e4ceebf8b387d015fff7ed8a7fcca33279afe
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
https://github.com/runatlantis/atlantis/security/advisories/GHSA-26w5-6g95-gj28

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Source: NIST National Vulnerability Database (record CVE-2026-64679), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.