CVE-2026-18967

highpriority · track · 32OT risk · elevatedEPSS 0.002 · 14 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.23% (14th) EPSS

CVSS 8.1 · high

Is it mine?

10 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.

cvss

Technical severity, 0–10. One row per scoring source.

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–8.1

v3.18.1highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 5.2

v3.16.4mediumCVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.16.4mediumCVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · secalert@redhat.com USexploitability 1.2 · impact 5.2

v3.17.4highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-294US

affected products (10)

Products and version ranges known to be affected.

Open Source Keycloak Red Hat build of Keycloa <26.4-22all versionscert_bundDE
Open Source Keycloak Red Hat build of Keycloa <26.4.14-1all versionscert_bundDE
Open Source Keycloak Red Hat build of Keycloa <26.6-11all versionscert_bundDE
Open Source Keycloak Red Hat build of Keycloa <26.6.5-1all versionscert_bundDE
Open Source Keycloak≤ Red Hat build of Keycloa <26.4.14-1cert_bundDE
Open Source Keycloak≤ Red Hat build of Keycloa <26.4-22cert_bundDE
Open Source Keycloak≤ Red Hat build of Keycloa <26.6-11cert_bundDE
Open Source Keycloak≤ Red Hat build of Keycloa <26.6.5-1cert_bundDE
redhat build of keycloakall versionsnvdUScpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*
redhat jboss enterprise application platform expansion packall versionsnvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2677RedHat Build of Keycloak: Mehrere SchwachstellenDeutsch2026-08-05csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um Administratorrechte zu erlangen, Benutzerkonten zu übernehmen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder einen Denial-of-Service-Zustand herbeizuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2026-08-06modified 2026-08-10

references (6)

External citations — patches, advisories, analysis.

scry

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