FKIE_CVE-2026-7507

Vulnerability from fkie_nvd - Published: 2026-05-19 12:16 - Updated: 2026-06-30 03:21
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:19594Vendor Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:19595Vendor Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:19596Vendor Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:19597Vendor Advisory
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-7507Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2464145Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:19594Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:19595Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:19596Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:19597Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-7507Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2464145Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7507.json
Impacted products
Vendor Product Version
redhat build_of_keycloak *
To clipboard 

{
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              "versionType": "rpm"
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          "vendor": "Red Hat"
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      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
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          "cpeMatch": [
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              "criteria": "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "26.4.12",
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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
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    }
  ],
  "id": "CVE-2026-7507",
  "lastModified": "2026-06-30T03:21:21.707",
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          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
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          "userInteraction": "REQUIRED",
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          "options": [
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            {
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            {
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          "role": "CISA Coordinator",
          "timestamp": "2026-05-19T13:40:38.753128Z",
          "version": "2.0.3"
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}



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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.