CVSS 3.1
6.4 mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:NCVE-2026-107124
Medium (6.4) in red hat. EPSS 0.4% estimated probability of exploitation activity in the next 30 days.
On this page
A flaw was found in the OIDC logout endpoint of the keycloak-services component, which handles user session termination in Red Hat Build of Keycloak. The issue occurs because the system sets a session cookie based on an unvalidated token hint before completing security checks. An attacker can use this flaw to fix a session ID in a victim's browser, allowing them to hijack the victim's subsequent login and gain full control over their account.
Severity
- EPSS
- 0.4% estimated probability of exploitation activity in the next 30 days; 36th percentile. Scored 2026-11-10. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-384 Session Fixation
- OWASP Top 10
- A07:2025 Authentication Failures
- Published
- Modified
- Assigned by
- redhat (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
Ask an AI about this CVE
Show the prompt
Explain CVE-2026-107124 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-107124?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-107124?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-107124 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Affected
- red hat:red hat build of keycloak 26.6
- red hat:red hat build of keycloak 26.6.8
- red hat:red hat single sign-on 7
Versions
From the CNA's record in the CVE List.
Fixed in
| Product | Fixed in |
|---|---|
| Red Hat build of Keycloak 26.6 | 26.6.8-2 |
| Red Hat build of Keycloak 26.6 | 26.6-24 |
Red Hat
Red Hat rates this Moderate.
The Red Hat Product Security team has assessed the severity of this vulnerability as Important, given that it requires the victim to have no active session and be induced to visit a crafted URL within a specific timing window. Successful exploitation allows an attacker to achieve full account takeover of any user in the realm, including administrators. The vulnerability's root cause is the premature setting of session cookies before token validation and the reuse of authentication session IDs during login.
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat build of Keycloak 26.6 | rhbk/keycloak-operator-bundle:26.6.8-2 | Fixed 2026-11-06 | RHSA-2026:95762 |
| Red Hat build of Keycloak 26.6 | rhbk/keycloak-rhel9:26.6-24 | Fixed 2026-11-06 | RHSA-2026:95762 |
| Red Hat build of Keycloak 26.6 | rhbk/keycloak-rhel9-operator:26.6-24 | Fixed 2026-11-06 | RHSA-2026:95762 |
| Red Hat build of Keycloak 26.6.8 | keycloak-services | Fixed 2026-11-06 | RHSA-2026:95761 |
| Red Hat build of Keycloak 26.6.8 | rhbk/keycloak-rhel9 | Fixed 2026-11-06 | RHSA-2026:95761 |
| Red Hat Single Sign-On 7 | keycloak-services | Fix deferred |
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-107124.
Attack patterns (CAPEC)
- CAPEC-21 Exploitation of Trusted Identifiers Likelihood: High · Severity: High
- CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies Likelihood: High · Severity: High
- CAPEC-39 Manipulating Opaque Client-based Data Tokens Likelihood: High · Severity: Medium
- CAPEC-59 Session Credential Falsification through Prediction Likelihood: High · Severity: High
- CAPEC-60 Reusing Session IDs (aka Session Replay) Likelihood: High · Severity: High
- CAPEC-61 Session Fixation Likelihood: Medium · Severity: High
- CAPEC-196 Session Credential Falsification through Forging Likelihood: Medium · Severity: Medium
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.