CVE-2026-105118 OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession
Unauthenticated attackers can redirect users to malicious sites via forged id_token_hint in OpenAM endSession, enabling phishing attacks.
- 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-2026-105118?
CVE-2026-105118 is a low-severity vulnerability in OpenIdentityPlatform OpenAM, published on 3 Oct 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
OpenAM before 16.1.3 contains an open redirect vulnerability that allows unauthenticated attackers to redirect users by supplying an unverified id_token_hint to the /oauth2/connect/endSession endpoint. Attackers can name any realm client in a forged hint to redirect victims to any registered post-logout URI, enabling phishing that borrows the OpenAM host's trust.
Weakness: CWE-347
Which versions are affected by CVE-2026-105118?
How do I fix CVE-2026-105118?
No fix has been published for CVE-2026-105118 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105118 being exploited?
There is no known exploitation of CVE-2026-105118 in the wild and no public exploit code.
Sources
Also known as GHSA-6f8c-crwq-jqm3, GHSA-mxvw-rw3m-5c33.