CVE-2026-82282

Atlantis GitHub App Setup Endpoint Returns App Credentials to Unauthenticated Callers

Published Aug 28, 2026 CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Atlantis GitHub App Setup Endpoint Returns App Credentials to Unauthenticated Callers
First Time appeared Runatlantis
Runatlantis atlantis
Weaknesses CWE-306
CPEs cpe:2.3:a:runatlantis:atlantis:*:*:*:*:*:*:*:*
Vendors & Products Runatlantis
Runatlantis atlantis
References
Metrics cvssV3_1

{'score': 8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N'}

cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 24, 2026, 2:20 PM
Reserved
Aug 28, 2026, 11:12 AM
Status
Deferred
Published
Aug 28, 2026, 8:20 PM
Modified
Sep 24, 2026, 8:43 PM