CVE-2026-1035
Org.keycloak.protocol.oidc: keycloak refresh token reuse bypass via toctou race condition
02 Description
Org.keycloak.protocol.oidc: keycloak refresh token reuse bypass via toctou race condition
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 ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.30% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 22.8% of scored records. A rank, not a probability.
- NVD base score
- 3.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
- NVD analysis status
- Deferred. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. 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
- 2026-01-21 05:52Z9 MO AGO
- Last updated
- 2026-04-02 16:47Z6 MO AGO
- Reserved
- 2026-01-16
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Low (CVSS 3.1)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase
- Data version
- 5.2
- Document digest
- bd664e62812c6e703d1974d664cb9bd6337ebd651647393d752e858e699aecd8
05 Affected products
06 References
- access.redhat.comRHSA-2026:6477https://access.redhat.com/errata/RHSA-2026:6477
- access.redhat.comRHSA-2026:6478https://access.redhat.com/errata/RHSA-2026:6478
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-1035
- bugzilla.redhat.comRHBZ#2430314https://bugzilla.redhat.com/show_bug.cgi?id=2430314
07 Fixed in
Ubuntu 24.04 LTS
- python-keycloak No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- python-keycloak No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- python-keycloak No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.