Low severity3.1GHSA Advisory· Published Jan 21, 2026· Updated Apr 15, 2026
CVE-2026-1035
CVE-2026-1035
Description
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.keycloak:keycloak-servicesMaven | <= 26.2.5 | — |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
7- github.com/advisories/GHSA-m2w5-7xhv-w6fhghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-1035ghsaADVISORY
- access.redhat.com/errata/RHSA-2026:6477nvdWEB
- access.redhat.com/errata/RHSA-2026:6478nvdWEB
- access.redhat.com/security/cve/CVE-2026-1035nvdWEB
- bugzilla.redhat.com/show_bug.cginvdWEB
- github.com/keycloak/keycloak/issues/45647ghsaWEB
News mentions
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