CVE-2026-7507 (GCVE-0-2026-7507)

Vulnerability from cvelistv5 – Published: 2026-05-19 11:01 – Updated: 2026-05-20 15:48
VLAI?
Title
Org.keycloak/keycloak-services: session fixation in oidc login flow that can lead to account takeover
Summary
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.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-290 - Authentication Bypass by Spoofing
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:19594 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19595 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19596 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19597 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-7507 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2464145 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2.16-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2-21 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2-21 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2.16     cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.12-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-17 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-17 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.12     cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Date Public ?
2026-05-19 10:51
Credits
Red Hat would like to thank Hacking Team (Calif.io) for reporting this issue.
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.