CVE-2026-96446 Keycloak-services: keycloak-services: par single-use bypass via prompt=none silent authentication path
Attackers can bypass single-use restrictions on Pushed Authorization Requests via silent authentication, potentially obtaining multiple authorization codes for logged-in users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-96446?
CVE-2026-96446 is a medium-severity vulnerability in Red Hat Build of Keycloak, published on 23 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in the Pushed Authorization Request PAR implementation of Keycloak. The issue occurs when the silent authentication path prompt=none is used, which allows the authorization process to skip certain steps if a user is already logged in. Due to this bypass, the security rule that ensures a pushed request URI is used only once is not enforced. An attacker could potentially reuse a request URI to obtain multiple authorization codes for a user who is already signed in, violating security standards like FAPI-2.
Weakness: CWE-862
Which versions are affected by CVE-2026-96446?
How do I fix CVE-2026-96446?
No fix has been published for CVE-2026-96446 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-96446 being exploited?
There is no known exploitation of CVE-2026-96446 in the wild and no public exploit code.
Sources
Also known as GHSA-j24v-wv3r-fjch.