Advisoriesby IbisRed HatCVE-2026-18967
Red Hat SAML broker: capture-replay
No fix yet
A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Build of Keycloak Product | all versions | No fix yet |
| all versions | No fix yet | |
| all versions | No fix yet | |
| Red Hat JBoss Enterprise Application Platform Expansion Pack Product | all versions | No fix yet |
| Red Hat Single Sign-On 7 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-294