CVE-2026-82282: Missing Authentication for Critical Function in runatlantis atlantis
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.
CVSS v4.0
Score 8.8high
Affected software
runatlantis
atlantis
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-82282 describes a missing authentication vulnerability in the Atlantis software (runatlantis project) affecting versions up to and including 0.47.1. The /github-app/setup endpoint does not require authentication, permitting unauthenticated attackers to intercept or observe the GitHub redirect during setup. This exposure allows attackers to obtain critical credentials such as the RSA private key and webhook secret, which can be used to mint installation tokens and forge webhook payloads, compromising the integrity and security of GitHub App integrations.
Potential Impact
The vulnerability enables unauthenticated attackers to access sensitive GitHub App credentials, including the RSA private key and webhook secret. This can lead to unauthorized minting of installation tokens and forging of webhook payloads, potentially allowing attackers to impersonate the GitHub App and manipulate webhook events. The CVSS 4.0 score is 8.8 (high severity), reflecting the critical nature of the credential exposure and its impact on authentication and integrity.
Mitigation Recommendations
No patch or official fix information is provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the /github-app/setup endpoint and monitor for suspicious activity related to GitHub App credentials.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-28T11:12:51.276Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a91e416acd9273b4942e91c
Added to database: 08/28/2026, 19:40:06 UTC
Last enriched: 09/25/2026, 02:44:10 UTC
Last updated: 10/12/2026, 18:48:23 UTC
Views: 48
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