High severity7.5NVD Advisory· Published May 19, 2026· Updated Jun 3, 2026
CVE-2026-7307
CVE-2026-7307
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.keycloak:keycloak-saml-coreMaven | < 26.6.2 | 26.6.2 |
Affected products
2Patches
Vulnerability mechanics
References
11- access.redhat.com/errata/RHSA-2026:19594nvdVendor AdvisoryWEB
- access.redhat.com/errata/RHSA-2026:19595nvdVendor AdvisoryWEB
- access.redhat.com/errata/RHSA-2026:19596nvdVendor AdvisoryWEB
- access.redhat.com/errata/RHSA-2026:19597nvdVendor AdvisoryWEB
- access.redhat.com/security/cve/CVE-2026-7307nvdVendor AdvisoryWEB
- bugzilla.redhat.com/show_bug.cginvdVendor AdvisoryWEB
- github.com/advisories/GHSA-p5mv-gj8j-xqgfghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-7307ghsaADVISORY
- github.com/keycloak/keycloak/commit/be84d28ce4c69c038d542f11405d5ede1d61f4a9ghsaWEB
- github.com/keycloak/keycloak/pull/49119ghsaWEB
- github.com/keycloak/keycloak/releases/tag/26.6.2ghsaWEB
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