8.0High
CVE-2026-82282Atlantis GitHub App Setup Endpoint Returns App Credentials to Unauthenticated Callers
Description
Atlantis through 0.47.1 fails to authenticate the /github-app/setup endpoint, allowing unauthenticated attackers to access GitHub App credentials. Attackers can observe or intercept the GitHub redirect during setup to obtain the RSA private key and webhook secret, enabling installation token minting and webhook payload forgery.
Weakness (CWE):
CWE-306
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| runatlantis | atlantis | ≤ 0.47.1 |
References and patches
- GitHub Issue #6622 issue-tracking
- https://github.com/runatlantis/atlantis product
- Vulnerable code: github_app_controller.go technical-description
- Vulnerable code: middleware.go technical-description
- VulnCheck Advisory: Atlantis GitHub App Setup Endpoint Returns App Credentials to Unauthenticated Callers third-party-advisory