CVE-2026-7307Keycloak: keycloak: denial of service via specially crafted saml input
Updated under an hour ago ()
This data is behind schedule: last updated Oct 26, 2026, 6:40 AM ET. We are working on it.Behind: CVE records (cvelistV5).
Does this affect you?
It affects Red Hat build of Keycloak 26.2 and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-1286
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat build of Keycloak 26.2 redhat:build_keycloak | from 26.2.16-1 not affected | CNA record |
Red Hat Red Hat Single Sign-On 7.6.13 redhat:red_hat_single_sign_on | 7.6 | CNA record |
Red Hat RHEL-8 based Middleware Containers redhat:rhosemc | from 7.6-85 not affected | CNA record |
Red Hat Red Hat build of Keycloak 26.2 redhat:build_keycloak | from 26.2.16-1 not affected | CISA ADP |
redhat build_of_keycloak redhat:build_of_keycloak | from 26.4 before 26.4.12 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:19594vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:19595vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:19596vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:19597vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:76128vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:76129vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:76130vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:76132vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:76134vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-7307vdb-entry, x-refsource-redhat, vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2476526issue-tracking, x-refsource-redhat, vendor-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7307.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.