CVE-2026-92358 Keycloak-services: keycloak-services: residual cross-browser account-link proof allows silent re-linking
Attackers can silently re-link accounts using residual proofs, gaining unauthorized access to victim accounts without confirmation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-92358?
CVE-2026-92358 is a medium-severity authentication bypass vulnerability in Red Hat Build of Keycloak, published on 16 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A flaw was found in the first broker login flow of Keycloak. When a user confirms an account-linking request from a different browser, a temporary proof is created to validate the link. However, this proof is not properly cleared after the link is established or when the user later manually removes the link. An attacker who controls the external identity can exploit this leftover proof to silently re-establish the link and gain unauthorized access to the victims account without any further confirmation.
Weakness: CWE-613
Which versions are affected by CVE-2026-92358?
How do I fix CVE-2026-92358?
No fix has been published for CVE-2026-92358 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-92358 being exploited?
There is no known exploitation of CVE-2026-92358 in the wild and no public exploit code.
Sources
Also known as GHSA-prm3-wvj6-64vx.