Advisory details:
github_osv / GHSA-hf67-5vvq-fm3r
| Advisory ID | github_osv/GHSA-hf67-5vvq-fm3r |
| Aliases |
CVE-2026-7507
|
| Summary | Keycloak: Session fixation in OIDC login flow that can lead to account takeover 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. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 6.8 |
| Risk | 3.4 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 7.5 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-hf67-5vvq-fm3r/GHSA-hf67-5vvq-fm3r.json |
| generic_textual | HIGH |
| Reference id | Reference type | URL |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-7507 | ||
| https://bugzilla.redhat.com/show_bug.cgi?id=2464145 | ||
| https://github.com/keycloak/keycloak | ||
| https://github.com/keycloak/keycloak/commit/d791b270b9ea5203be40a9533c1c12c4d044fb52 | ||
| https://github.com/keycloak/keycloak/pull/49134 | ||
| https://github.com/keycloak/keycloak/releases/tag/26.6.2 | ||
| CVE-2026-7507 | https://nvd.nist.gov/vuln/detail/CVE-2026-7507 | |
| RHSA-2026:19594 | Advisory | https://access.redhat.com/errata/RHSA-2026:19594 |
| RHSA-2026:19595 | Advisory | https://access.redhat.com/errata/RHSA-2026:19595 |
| RHSA-2026:19596 | Advisory | https://access.redhat.com/errata/RHSA-2026:19596 |
| RHSA-2026:19597 | Advisory | https://access.redhat.com/errata/RHSA-2026:19597 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-05-19T13:40:38Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/7xxx/CVE-2026-7507.json
Source Advisory: vulnrichment/CVE-2026-7507
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'total'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-05-19T13:40:38Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/7xxx/CVE-2026-7507.json
Source Advisory: vulnrichment/CVE-2026-7507
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'total'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]