A flaw was found in the first broker login flow of Keycloak.
CVE-2026-92358
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.
Assessment
- CVSS
- 6.4 (v3.1)
- Severity
- Medium
- EPSS
- 0.27% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 16 September 2026
- Last updated
- 3 November 2026
- Assigner
- redhat
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
At the source
References
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