Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
Maven

CVE-2025-11419

HIGH

CVE-2025-11419 is a high-severity (CVSS 7.5) CWE-770 vulnerability in org.keycloak:keycloak-quarkus-dist. O3 Security confirms whether CVE-2025-11419 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Keycloak: keycloak tls client-initiated renegotiation denial of service

Also known asGHSA-q8hq-4h99-fj7x
Published
Dec 23, 2025
Updated
Jul 16, 2026
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed

Blast Radius

3 pkgs affected
org.keycloak:keycloak-quarkus-distorg.keycloak:keycloak-quarkus-distorg.keycloak:keycloak-quarkus-dist

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

A flaw was found in Keycloak. This vulnerability allows an unauthenticated remote attacker to cause a denial of service (DoS) by repeatedly initiating TLS 1.2 client-initiated renegotiation requests to exhaust server CPU resources, making the service unavailable.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
Mavenorg.keycloak:keycloak-quarkus-distall versions26.0.16
Mavenorg.keycloak:keycloak-quarkus-dist26.1.0&&< 26.2.1026.2.10
Mavenorg.keycloak:keycloak-quarkus-dist26.3.0&&< 26.4.126.4.1

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.keycloak:keycloak-quarkus-dist. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update org.keycloak:keycloak-quarkus-dist to 26.0.16 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-11419 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether CVE-2025-11419 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2025-11419. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

A flaw was found in Keycloak. This vulnerability allows an unauthenticated remote attacker to cause a denial of service (DoS) by repeatedly initiating TLS 1.2 client-initiated renegotiation requests to exhaust server CPU resources, making the service unavailable.
O3 Security · Impact-Aware SCA

Is CVE-2025-11419 in your dependencies?

O3 detects CVE-2025-11419 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.