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CVE-2026-1035

Org.keycloak.protocol.oidc: keycloak refresh token reuse bypass via toctou race condition

Published: Jan 21, 2026Updated: Jan 26, 2026 Sources: CVE List NVD GHSACWE-367
NVD MITRE
3.1CVSSLOW
EPSS Score
0.3%
Top 80.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

Description

Keycloak does not validate and update refresh token usage atomically

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-367

Affected Products

org.keycloak:keycloak-servicesMavenOSS Libraries
Red Hat build of Keycloak 26.4Red Hat
On-premWeb App
Web & CMS Plugins
Red Hat build of Keycloak 26.4.11Red Hat
On-prem
Operating Systems / linux-distro
Red Hat JBoss Enterprise Application Platform 8Red Hat
On-premWeb App
Enterprise Software / itsm-monitoring
Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat
On-premOS
Operating Systems / linux-distro
mavenpackage-ecosystemOSS Libraries
red hatcommercialUSOperating Systemsaka red hat
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://nvd.nist.gov/vuln/detail/CVE-2026-1035
nvd.nist.gov
https://github.com/keycloak/keycloak/issues/45647
github.com
https://access.redhat.com/errata/RHSA-2026:6477
access.redhat.com
and 4 more references View all →

Timeline

Published
Jan 21, 2026
Last Updated
Jan 26, 2026

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