CVE-2026-82282

Atlantis GitHub App Setup Endpoint Returns App Credentials to Unauthenticated Callers

8.8 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

0.44%Up 0.2 points since Aug 29, 2026

What each source reports

CVE List Score used 8.8

Atlantis GitHub App Setup Endpoint Returns App Credentials to Unauthenticated Callers

Record: CVE-2026-82282
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
CVSS 3.1: 8.0 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Weakness: CWE-306
Updated: 2026-11-02

EUVDEUVD-2026-67813 8.8

Record: EUVD-2026-67813
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-r4h6-8wpf-fw98 8.8

Atlantis through 0.47.1 fails to authenticate the /github-app/setup endpoint, allowing...

Record: GHSA-r4h6-8wpf-fw98
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.0 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Weakness: CWE-306
Updated: 2026-11-02

NVD 8.8

Record: CVE-2026-82282
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.0 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Weakness: CWE-306
Updated: 2026-11-02

OSV 8.8

Atlantis GitHub App Setup Endpoint Returns App Credentials to Unauthenticated Callers

Record: CVE-2026-82282
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Weakness: CWE-306
Updated: 2026-11-02

Affected products

runatlantis atlantis

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-82282 is a high vulnerability (CVSS 8.8) in Runatlantis Atlantis, published August 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.44%, the 38th percentile. No source names a fixed version.