---
id: CVE-2026-64679
title: >-
  Atlantis is a self-hosted golang application that listens for Terraform pull
  request events via webhooks
summary: >-
  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 reposi…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-22
  - CWE-73
vendor: runatlantis
product: github.com/runatlantis/atlantis
affected:
  - 'github.com/runatlantis/atlantis >= 0.19.8, < 0.45.0'
patched:
  - github.com/runatlantis/atlantis 0.45.0
published: '2026-08-21'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:06:39.057'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64679'
references:
  - url: >-
      https://github.com/runatlantis/atlantis/commit/ea4e4ceebf8b387d015fff7ed8a7fcca33279afe
    label: security-advisories@github.com
  - url: 'https://github.com/runatlantis/atlantis/pull/6254'
    label: security-advisories@github.com
  - url: 'https://github.com/runatlantis/atlantis/releases/tag/v0.45.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/runatlantis/atlantis/security/advisories/GHSA-26w5-6g95-gj28
    label: security-advisories@github.com
  - url: >-
      https://github.com/runatlantis/atlantis/security/advisories/GHSA-26w5-6g95-gj28
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-26w5-6g95-gj28'
tags:
  - nvd
  - ghsa
  - go
epss: 0.00595
epssPercentile: 0.4714
aliases:
  - GHSA-26w5-6g95-gj28
ecosystem: go
ingestedAt: '2026-08-21T21:22:19.624Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-64679)

Affected packages:

- `github.com/runatlantis/atlantis >= 0.19.8, < 0.45.0`

Patched in:

- `github.com/runatlantis/atlantis 0.45.0`

Source: https://github.com/advisories/GHSA-26w5-6g95-gj28