Keycloak: keycloak: denial of service via specially crafted saml input
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 26.2.16, 26.4.12, 26.6.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server becomes unavailable.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- keycloak
fixed in 26.2.16; fixed in 26.4.12; fixed in 26.6.2
- rhbk/keycloak-operator-bundle
Version range not reported
- rhbk/keycloak-rhel9
Version range not reported
- rhbk/keycloak-rhel9-operator
Version range not reported
- rhbk/keycloak-rhel9
Version range not reported
- rhbk/keycloak-operator-bundle
Version range not reported
- rhbk/keycloak-rhel9
Version range not reported
- rhbk/keycloak-rhel9-operator
Version range not reported
- rhbk/keycloak-rhel9
Version range not reported
- keycloak-services
Version range not reported
- rh-sso7-keycloak
Version range not reported
- rh-sso7-keycloak
Version range not reported
- rh-sso7-keycloak
Version range not reported
- rh-sso-7/sso76-openshift-rhel8
Version range not reported
- org.keycloak:keycloak-saml-coreMaven
fixed in 26.6.2