CVE-2026-116676
Atlantis: OS command injection through PR-controlled Terraform workspace enables RCE during plan
Atlantis is a self-hosted golang application that listens for Terraform pull request events via webhooks. From version 0.4.0 until 0.47.1, Atlantis passes the pull-request-controlled workspace value from atlantis.yaml into Terraform command arguments that are joined with strings.Join(args, " ") and executed through sh -c. An authenticated contributor whose pull request is eligible for an Atlantis plan can include shell metacharacters in the workspace name, causing arbitrary commands to execute as the Atlantis service account without custom workflows, apply permission, or a malicious Terraform provider. External contributors can reach the flaw through fork pull requests only when --allow-fork-prs is enabled, while eligible same-repository branches do not require that option. The commands inherit the Atlantis process environment and can access cloud-provider, Terraform, and version-control credentials as well as files, state, and network resources available to the service. This issue is fixed in version 0.47.1.
Fixes and workarounds
Fix
github.com/runatlantis/atlantis (Go): OSV reports a fixed version 0.47.1. Check the advisory for supported release branches.
Source: OSV GHSA-rjh2-4xgw-p2hjAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| atlantis runatlantis |
>= 0.4.0, < 0.47.1 (affected) | CNA: GitHub_M |
github.com/runatlantis/atlantisgithub.com/runatlantis/atlantis
Go |
≥ 0.4.0; < 0.47.1 (affected, semver); OSV events: introduced 0.4.0; fixed 0.47.1Source events (semver)Other versions: unaffected |
OSV GHSA-rjh2-4xgw-p2hj |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.8 high |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CNA: GitHub_M |
Exploit evidence
- https://github.com/runatlantis/atlantis/security/advisories/GHSA-rjh2-4xgw-p2hj
exploit · ADP: CISA-ADP
References
- https://github.com/runatlantis/atlantis/security/advisories/GHSA-rjh2-4xgw-p2hjCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/runatlantis/atlantis/pull/6792CNA: GitHub_M · x_refsource_MISC
- https://github.com/runatlantis/atlantis/commit/8dd22b4d0a9d7c129fdbf6a3398dd1c4cf8c3a59CNA: GitHub_M · x_refsource_MISC
- https://github.com/runatlantis/atlantis/commit/f04df0d53f0544d9eb6f5026dd8b74fbefd82ac8CNA: GitHub_M · x_refsource_MISC
- https://github.com/runatlantis/atlantis/releases/tag/v0.47.1CNA: GitHub_M · x_refsource_MISC
- https://github.com/runatlantis/atlantis/security/advisories/GHSA-rjh2-4xgw-p2hjADP: CISA-ADP · exploit
- https://github.com/advisories/GHSA-rjh2-4xgw-p2hjOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-rjh2-4xgw-p2hjOSV / GitHub Security Advisories · osv
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