Skip to content
Fencer Vulns
high 7.1

CVE-2024-10039 json

Keycloak mTLS Authentication Bypass via Reverse Proxy TLS Termination

published 2024-11-25 23 mo ago modified 2026-09-10 1 mo ago also GHSA-93ww-43rr-79v3

cvss
7.1
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
—
no EPSS score yet
public exploits
0
none known

Summary

A vulnerability was found in Keycloak. Deployments of Keycloak with a reverse proxy not using pass-through termination of TLS, with mTLS enabled, are affected. This issue may allow an attacker on the local network to authenticate as any user or client that leverages mTLS as the authentication mechanism.

Patch / fix

  • maven org.keycloak:keycloak-core 26.0.6

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-10039 updated cvss 7.1

keycloak-core: mTLS passthrough

  • Red Hat Build of Keycloak keycloak-core Red Hat Single Sign-On 7 keycloak-core
    affected: no fix planned “Will not fix”
  • Red Hat build of Keycloak 24 rhbk/keycloak-rhel9 24-18, rhbk/keycloak-rhel9-operator 24-18, rhbk/keycloak-operator-bundle 24.0.9-1
    fixed: vendor fix RHSA-2024:10175
  • Red Hat build of Keycloak 24.0.9
    fixed: vendor fix RHSA-2024:10176
  • Red Hat build of Keycloak 26.0 rhbk/keycloak-rhel9 26.0-5, rhbk/keycloak-rhel9-operator 26.0-6, rhbk/keycloak-operator-bundle 26.0.6-2
    fixed: vendor fix RHSA-2024:10177
  • Red Hat build of Keycloak 26.0.6
    fixed: vendor fix RHSA-2024:10178
  • Red Hat Single Sign-On 7
    fixed: vendor fix RHSA-2025:11645
  • Red Hat JBoss Enterprise Application Platform 8 keycloak-core Red Hat Satellite 6 candlepin, candlepin-selinux
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CVSS scores

assigned by version score vector
GitHub 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-core
<26.0.6
26.0.6

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.