CVE-2026-1035

lowpriority · track · 0EPSS 0.003 · 23 %ileDEEUJPUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.30% (23rd) EPSS

CVSS 3.1 · low

Is it mine?

11 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · osv

EPSS · scored 2026-10-27

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.

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:L/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

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

v3.12.9lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-367USCWE-367US

affected products (11)

Products and version ranges known to be affected.

Open Source Keycloak <26.5.6all versionscert_bundDE
Open Source Keycloak <26.5.7all versionscert_bundDE
Open Source Keycloak <=26.5.1all versionscert_bundDE
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux Keycloakall versionscert_bundDEcpe:/o:redhat:enterprise_linux:keycloak
Open Source Keycloak≤ 26.5.1cert_bundDE
Open Source Keycloak< 26.5.6cert_bundDE
Open Source Keycloak< 26.5.7cert_bundDE
Red Hat Red Hat build of Keycloak 26.4< 26.4-14enisa_euvdEU
Red Hat Red Hat build of Keycloak 26.4< 26.4.11-1enisa_euvdEU
Maven org.keycloak:keycloak-services≤ 26.2.5osvUSpkg:maven/org.keycloak/keycloak-services

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0197Keycloak: Mehrere SchwachstellenDeutsch2026-01-21csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um Informationen offenzulegen, und um Sicherheitsvorkehrungen zu umgehen.
GHSA-m2w5-7xhv-w6fhKeycloak does not validate and update refresh token usage atomically2026-01-21ghsa · osvUS
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.
JVNDB-2026-026852JVN iPedia advisory JVNDB-2026-0268522026-08-05vendor · jvndbJP

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 jvndb NVD CVE.org MITRE

published 2026-01-21modified 2026-06-17

references (11)

External citations — patches, advisories, analysis.

scry

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