CVE-2026-7307

EUVD-2026-30883
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 51.73%
Affected Products (NVD)
VendorProductVersion
redhatbuild_of_keycloak
26.4 ≤
𝑥
< 26.4.12
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
Red HatRed Hat build of Keycloak 26.2
26.2.16-1 ≤
𝑥
< *
ADP
Red HatRed Hat build of Keycloak 26.2
26.2-21 ≤
𝑥
< *
ADP
Red HatRed Hat build of Keycloak 26.2
26.2-21 ≤
𝑥
< *
ADP
Red HatRed Hat build of Keycloak 26.4
26.4.12-1 ≤
𝑥
< *
ADP
Red HatRed Hat build of Keycloak 26.4
26.4-17 ≤
𝑥
< *
ADP
Red HatRed Hat build of Keycloak 26.4
26.4-17 ≤
𝑥
< *
ADP
Common Weakness Enumeration
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