CVE-2026-82282 Atlantis GitHub App Setup Endpoint Returns App Credentials to Unauthenticated Callers
Unauthenticated attackers can access GitHub App credentials via the setup endpoint, enabling token minting and webhook forgery.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-82282?
CVE-2026-82282 is a high-severity missing authorization vulnerability in runatlantis atlantis, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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-306
Which versions are affected by CVE-2026-82282?
How do I fix CVE-2026-82282?
No fix has been published for CVE-2026-82282 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-82282 being exploited?
There is no known exploitation of CVE-2026-82282 in the wild and no public exploit code.
Sources
Also known as GHSA-r4h6-8wpf-fw98.