Answer in brief
CVE-2024-1249 records a High severity (CVSS 7.4) vulnerability in Keycloak: org.keycloak.protocol.oidc: unvalidated cross-origin messages in checkloginiframe leads to ddos. The current sources do not mark it as known exploited. The current feed maps keycloak (generic), Red Hat/keycloak (generic), Red Hat/keycloak-core (generic), Red Hat/mta/mta-ui-rhel9 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps keycloak (generic), Red Hat/keycloak (generic), Red Hat/keycloak-core (generic), Red Hat/mta/mta-ui-rhel9 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| keycloakgeneric | >=21.1.0 <22.0.10 || >=23.0.0 <24.0.3 | 22.0.10, 24.0.3 |
| Red Hat/keycloakgeneric | * | Not reported |
| Red Hat/keycloak-coregeneric | * | Not reported |
| Red Hat/mta/mta-ui-rhel9generic | * | Not reported |
Published upstream
Apr 17, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 8, 2026
A flaw was found in Keycloak's OIDC component in the "checkLoginIframe," which allows unvalidated cross-origin messages. This flaw allows attackers to coordinate and send millions of requests in seconds using simple code, significantly impacting the application's availability without proper origin validation for incoming messages.
Quoted source text, attributed separately from HOL analysis.