CVE-2026-1190

lowEPSS 0.004 · 35 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.42% (35th) EPSS

CVSS 3.1 · low

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · osv

EPSS · scored 2026-10-18

A flaw was found in Keycloak's SAML brokering functionality. When Keycloak is configured as a client in a Security Assertion Markup Language (SAML) setup, it fails to validate the `NotOnOrAfter` timestamp within the `SubjectConfirmationData`. This allows an attacker to delay the expiration of SAML responses, potentially extending the time a response is considered valid and leading to unexpected session durations or resource consumption.

cvss

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

3.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · secalert@redhat.com USexploitability 1.6 · impact 1.4

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · OSV

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-112USCWE-112USCWE-347USCWE-613US

affected products (6)

Products and version ranges known to be affected.

Hitachi Ops Center Common Services <11.0.8-00all versionscert_bundDE
Open Source Keycloak SAML brokeringall versionscert_bundDEcpe:/a:keycloak:keycloak:saml_brokering
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Red Hat build of Keycloak 26.4< 26.4-12enisa_euvdEU
Red Hat Red Hat build of Keycloak 26.4< 26.4.10-1enisa_euvdEU
Maven org.keycloak:keycloak-services≤ 26.5.2osvUSpkg:maven/org.keycloak/keycloak-services

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0147Keycloak (SAML brokering): Schwachstelle ermöglicht Manipulation von DateienDeutsch2026-01-19csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Keycloak ausnutzen, um Dateien zu manipulieren, was zu einer Umgehung der Authentifizierung oder einem Denial-of-Service führen kann.
GHSA-63v5-26vq-m4vmKeycloak's missing timestamp validation allows attackers to extend SAML response validity periods2026-01-26ghsa · osvUS
A flaw was found in Keycloak's SAML brokering functionality. When Keycloak is configured as a client in a Security Assertion Markup Language (SAML) setup, it fails to validate the `NotOnOrAfter` timestamp within the `SubjectConfirmationData`. This allows an attacker to delay the expiration of SAML responses, potentially extending the time a response is considered valid and leading to unexpected session durations or resource consumption.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund osv NVD CVE.org MITRE

published 2026-01-26modified 2026-06-17

references (12)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan