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01 Record

CVE-2026-15571

Keycloak-services: keycloak-services: predictable account-linking hash enables account takeover via malicious oidc client

HighPUBLISHEDCNA: redhat
CNA base score7.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
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02 Description

Keycloak-services: keycloak-services: predictable account-linking hash enables account takeover via malicious oidc client

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
0.43% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 36.9% of scored records. A rank, not a probability.
NVD base score
7.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-08-20.
Red Hat severity
Important. 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
2026-08-18 20:40Z2 MO AGO
Last updated
2026-08-20 14:07Z2 MO AGO
Reserved
2026-07-13
Assigning CNA
redhat
Record state
PUBLISHED
Severity
High (CVSS 7.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Weaknesses
  • CWE-341Predictable from Observable StateBase
Data version
5.2
Document digest
abc715c0514331e206244f2fa55cc8591f104e9f809be95d652454b56adf917a

05 Affected products

VendorProductVersionsPlatforms
Red HatRed Hat build of Keycloak 26.6Not specified—
Red HatRed Hat build of Keycloak 26.6.6Not specified—
Red HatRed Hat Data Grid 8Not specified—
Red HatRed Hat JBoss Enterprise Application Platform Expansion PackNot specified—
Red HatRed Hat Single Sign-On 7Not specified—

06 References