7.5highHigh
CVE-2026-7307
Redhat Build Of Keycloak
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.
Exploitation status
- A vendor advisory or patch reference has been published.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 7.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness
- CWE-1286
- Assigned by
- secalert@redhat.com
Dates
- Published
- 2026-05-19
- Last modified
- 2026-08-26
- Sources
- NVD
Affected products
- Redhat Build Of Keycloak26.4 - 26.4.12
As listed in the NVD configuration data. Not a statement about your estate.
References
- https://access.redhat.com/errata/RHSA-2026:19594
- https://access.redhat.com/errata/RHSA-2026:19595
- https://access.redhat.com/errata/RHSA-2026:19596
- https://access.redhat.com/errata/RHSA-2026:19597
- https://access.redhat.com/security/cve/CVE-2026-7307
- https://bugzilla.redhat.com/show_bug.cgi?id=2476526
- https://access.redhat.com/errata/RHSA-2026:19594
- https://access.redhat.com/errata/RHSA-2026:19595
- https://access.redhat.com/errata/RHSA-2026:19596
- https://access.redhat.com/errata/RHSA-2026:19597
- https://access.redhat.com/security/cve/CVE-2026-7307
- https://bugzilla.redhat.com/show_bug.cgi?id=2476526
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7307.json