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Advisory record · GHSA-rjh2-4xgw-p2hj

Atlantis: OS command injection through PR-controlled Terraform workspace enables RCE during plan

CVSS 8.8 HighEPSS 0.0047 · 40th percentile

Published by the GitHub Advisory Database at 27 Oct 2026, 21:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/runatlantis/atlantisGo>=0.4.0, <0.47.10.47.1
Identifiers
GHSA-rjh2-4xgw-p2hj · CVE-2026-116676 · GO-2026-6871
Weakness (CWE)
CWE-78
Tags
Published
27 Oct 2026
Updated
5 Nov 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Atlantis versions from 0.4.0 before 0.47.1 are vulnerable to OS command injection. A contributor whose pull request can trigger an Atlantis plan can put shell metacharacters in the Terraform workspace name in atlantis.yaml, which runs arbitrary commands as the Atlantis service account without custom workflows or apply permission. Upgrade to Atlantis 0.47.1 or later. The source lists no other workaround.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.8 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0047, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 27 Oct 2026, 17:11 UTC Confirmed by the CVE List
  2. 27 Oct 2026, 18:17 UTC Confirmed by NVD
  3. 31 Oct 2026, 14:11 UTC First seen by agentprime
  4. 31 Oct 2026, 14:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.