3.1

CVE-2026-1035

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

A flaw was found in the Keycloak server during refresh token processing, specifically in the TokenManager class responsible for enforcing refresh token reuse policies. When strict refresh token rotation is enabled, the validation and update of refresh token usage are not performed atomically. This allows concurrent refresh requests to bypass single-use enforcement and issue multiple access tokens from the same refresh token. As a result, Keycloak’s refresh token rotation hardening can be undermined.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4
Default Statusaffected
Version 26.4.11-1
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4
Default Statusaffected
Version 26.4-14
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4
Default Statusaffected
Version 26.4-14
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4.11
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat JBoss Enterprise Application Platform 8
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat JBoss Enterprise Application Platform Expansion Pack
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Single Sign-On 7
Default Statusunaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.01% 0.012
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
secalert@redhat.com 3.1 1.6 1.4
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.