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01 Record

CVE-2026-18967

Keycloak-services: keycloak-services: saml onetimeuse assertion replay in idp-initiated broker flow

MediumPUBLISHEDCNA: redhat
CNA base score6.4 CVSS v3.xCVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

02 Description

Keycloak-services: keycloak-services: saml onetimeuse assertion replay in idp-initiated broker flow

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.23% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 14.0% of scored records. A rank, not a probability.
NVD base score
8.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-08-10.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-08-06 05:33Z2 MO AGO
Last updated
2026-08-06 17:31Z2 MO AGO
Reserved
2026-08-05
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Medium (CVSS 6.4)
CNA CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Weaknesses
  • CWE-294Authentication Bypass by Capture-replayBase
Data version
5.2
Document digest
64d26e62d117a9ddbaac68d4879455d8f6252af7cd06d8580f9a0329fa920b7a

05 Affected products

VendorProductVersionsPlatforms
Red HatRed Hat Build of KeycloakNot specified—
Red HatRed Hat Single Sign-On 7Not specified—

06 References