CVE-2026-7507
No exploitation reported by the sources we read.
- Published2026-05-19
- Fixed in26.4.12
- WeaknessCWE-290
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2026-05-1912:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-7507?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-7507?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 26.4 | ≥ 26.4, < 26.4.12 | 26.4.12 | NVD |
| 26.4 | ≥ 26.4.0, < 26.4.12 | 26.4.12 | OSV |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 26.6 | < 26.6.2 | 26.6.2 | OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 7
Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 9
Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 8
Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 for OpenShift image security update
Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update
Fix
- Update Redhat build of keycloak to 26.4.12
- Vendor fix Red Hat Product Security RHSA-2026:76128 · 3 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
- Vendor fix Red Hat Product Security RHSA-2026:76134 · 3 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
- Vendor fix Red Hat Product Security RHSA-2026:76132 · 1 productBefore applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. The References section of this erratum contains a download link (you must log in to download the update).
- Workaround from the vendor Red Hat Product Security RHSA-2026:76128 · 3 productsMitigation 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.
Advisories and patches
- access.redhat.comVendor Advisory
- access.redhat.comVendor Advisory
- access.redhat.comVendor Advisory
- access.redhat.comVendor Advisory
- access.redhat.comVendor Advisory
- bugzilla.redhat.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2026-05-19
- Last Modified
- 2026-10-06
- NVD status
- Modified
Frequently asked questions
What is CVE-2026-7507?
Is CVE-2026-7507 actively exploited?
What is the CVSS score for CVE-2026-7507?
Running keycloak? Hear about its next vulnerability
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Go further
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.