CVE-2026-7507 Build of Keycloak
| Affected software | Build of Keycloak |
|---|---|
| Severity | 7.5 High CVSS 3.1 2 scores |
| Fixed in | 26.6.2 |
| Weakness | CWE-290 |
| Published | 19 May 2026 |
| Updated | 26 Oct 2026 |
Description
A session fixation vulnerability was found in Keycloak's login-actions endpoints. An unauthenticated attacker could exploit this flaw by pre-creating an authentication session and tricking a victim into visiting a maliciously crafted link. By leveraging the /login-actions/restart endpoint—which processes session handles without adequate CSRF protection or cookie ownership validation—an attacker can reset the authentication flow state. This causes Single Sign-On (SSO) to authenticate the victim transparently upon clicking the link, allowing the attacker to hijack the required-action form without needing the victim's credentials. A successful exploit could lead to complete account takeover, including highly privileged administrative accounts.
Exploitation status
No public exploit
No exploit has been reported in the sources we check.
Exploitation status
- CISA KEV not listed
- VulnCheck KEV not listed
- CISA Vulnrichment exploitation: none
- Indexed PoC none indexed
- EPSS 0.84% chance in 30 days
Waratek protection
Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.
A public code fix exists: keycloak/keycloak #49134.
- Protection none
- Action unverified
- Review automated Upstream data
- Record active
| Decided by | Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all |
|---|---|
| Finding | This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious. |
| Candidate fix | https://bugzilla.redhat.com/show_bug.cgi?id=2464145 : a Red Hat bug: the triage, which links onward to the fix |
CVSS
7.5 HIGH
v3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
2 metrics
CVSS
7.5 HIGH v3.1CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
2 metrics
We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.
| Version | Score | Band | Vector | Assigner | Type | |
|---|---|---|---|---|---|---|
| CVSS 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
secalert@redhat.com | Secondary | published |
| CVSS 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
redhat-SADP | Secondary |
Affected software and releases
Maven packages
Affected and fixed versions, from OSV.dev| Package | Introduced | Fixed | Last affected |
|---|---|---|---|
org.keycloak:keycloak-services |
0 | 26.6.2 |
unbounded |
Products and versions
2 products, 2 version entries| Source | Vendor | Product | Scheme | Affected versions |
|---|---|---|---|---|
| osv | org.keycloak | keycloak-services | generic | ＜ 26.6.2 |
| nvd | redhat | build of keycloak | generic | ≥ 26.4 and ＜ 26.4.12 |
References
Timeline
Timeline
| Published | 2026-05-19 | By the CVE Program. |
|---|---|---|
| NVD record modified | 2026-10-26 | NVD's own last-modified date for this record. |