Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-05-19 11:01 – Updated: 2026-07-15 00:39

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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-19 13:40 UTC

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

redhat redhat root

References

7 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
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

8 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
Red Hat	Red Hat build of Keycloak 26.2	Unaffected: 26.2-21 , < * (rpm) cpe:/a:redhat:build_keycloak:26.2::el9
Red Hat	Red Hat build of Keycloak 26.2.16	cpe:/a:redhat:build_keycloak:26.2::el9
Red Hat	Red Hat build of Keycloak 26.4	Unaffected: 26.4.12-1 , < * (rpm) cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat	Red Hat build of Keycloak 26.4	Unaffected: 26.4-17 , < * (rpm) cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat	Red Hat build of Keycloak 26.4.12	cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat	Red Hat build of Keycloak 26.2.16	Unaffected: rhel9-operator , < * (rpm) cpe:/a:redhat:build_keycloak:26.2::el9
Red Hat	Red Hat build of Keycloak 26.4.12	Unaffected: rhel9-operator , < * (rpm) cpe:/a:redhat:build_keycloak:26.4::el9

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

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\"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-05-19T10:51:31.418Z\", \"value\": \"Made public.\"}], \"datePublic\": \"2026-05-19T10:51:31.418Z\", \"references\": [{\"url\": \"https://access.redhat.com/errata/RHSA-2026:19594\", \"name\": \"RHSA-2026:19594\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:19595\", \"name\": \"RHSA-2026:19595\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:19596\", \"name\": \"RHSA-2026:19596\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:19597\", \"name\": \"RHSA-2026:19597\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2026-7507\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2464145\", \"name\": \"RHBZ#2464145\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Mitigation 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.\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A session fixation vulnerability was found in Keycloak\u0027s 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\\u2014which processes session handles without adequate CSRF protection or cookie ownership validation\\u2014an 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\u0027s credentials. A successful exploit could lead to complete account takeover, including highly privileged administrative accounts.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-290\", \"description\": \"Authentication Bypass by Spoofing\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-05-20T15:48:23.138Z\"}, \"x_redhatCweChain\": \"CWE-290: Authentication Bypass by Spoofing\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-7507\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-15T00:39:55.946Z\", \"dateReserved\": \"2026-04-30T14:58:15.177Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-05-19T11:01:25.443Z\", \"assignerShortName\": \"redhat\"}",
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}

bit-keycloak-2026-7507

Vulnerability from bitnami_vulndb

Published

2026-08-25 11:42

Modified

2026-09-08 08:34

Summary

Org.keycloak/keycloak-services: session fixation in oidc login flow that can lead to account takeover

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "keycloak",
        "purl": "pkg:bitnami/keycloak"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "26.4.0"
            },
            {
              "fixed": "26.4.12"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-7507"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*",
      "cpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "A session fixation vulnerability was found in Keycloak\u0027s 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\u2014which processes session handles without adequate CSRF protection or cookie ownership validation\u2014an 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\u0027s credentials. A successful exploit could lead to complete account takeover, including highly privileged administrative accounts.",
  "id": "BIT-keycloak-2026-7507",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-08-25T11:42:36.076Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:19594"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:19595"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:19596"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:19597"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-7507"
    },
    {
      "type": "ADVISORY",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464145"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7507"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7507.json"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Org.keycloak/keycloak-services: session fixation in oidc login flow that can lead to account takeover"
}

FKIE_CVE-2026-7507

Vulnerability from fkie_nvd - Published: 2026-05-19 12:16 - Updated: 2026-07-15 01:17

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

References

URL	Tags
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:19594	Vendor Advisory
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:19595	Vendor Advisory
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:19596	Vendor Advisory
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:19597	Vendor Advisory
secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-7507	Vendor Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2464145	Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:19594	Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:19595	Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:19596	Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:19597	Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-7507	Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2464145	Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7507.json

Impacted products

	Vendor	Product	Version
	redhat	build_of_keycloak	*

JSON

To clipboard

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  "configurations": [
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  ],
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  "lastModified": "2026-07-15T01:17:00.677",
  "metrics": {
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      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464145"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/errata/RHSA-2026:19594"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/errata/RHSA-2026:19595"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/errata/RHSA-2026:19596"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/errata/RHSA-2026:19597"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-7507"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464145"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7507.json"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}

GHSA-HF67-5VVQ-FM3R

Vulnerability from github – Published: 2026-05-19 12:31 – Updated: 2026-06-04 15:37

Summary

Keycloak: Session fixation in OIDC login flow that can lead to account takeover

Details

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "26.6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-7507"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-290"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-04T15:37:17Z",
    "nvd_published_at": "2026-05-19T12:16:19Z",
    "severity": "HIGH"
  },
  "details": "A session fixation vulnerability was found in Keycloak\u0027s 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\u2014which processes session handles without adequate CSRF protection or cookie ownership validation\u2014an 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\u0027s credentials. A successful exploit could lead to complete account takeover, including highly privileged administrative accounts.",
  "id": "GHSA-hf67-5vvq-fm3r",
  "modified": "2026-06-04T15:37:17Z",
  "published": "2026-05-19T12:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7507"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/pull/49134"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/d791b270b9ea5203be40a9533c1c12c4d044fb52"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:19594"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:19595"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:19596"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:19597"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-7507"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464145"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/keycloak/keycloak"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/releases/tag/26.6.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Keycloak: Session fixation in OIDC login flow that can lead to account takeover"
}

RHSA-2026:19594

Vulnerability from csaf_redhat - Published: 2026-05-20 11:23 - Updated: 2026-08-26 16:35

Summary

Red Hat Security Advisory: Red Hat build of Keycloak 26.2.16 Security Update

Severity

Important

Scope

3 vulnerabilities in this advisory, including CVE-2026-7507.

CVE-2026-7507

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:19594

Open the full advisory

RHSA-2026:19595

Vulnerability from csaf_redhat - Published: 2026-05-20 11:23 - Updated: 2026-08-26 16:35

Summary

Red Hat Security Advisory: Red Hat build of Keycloak 26.2.16 Images Security Update

Severity

Important

Scope

3 vulnerabilities in this advisory, including CVE-2026-7507.

CVE-2026-7507

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Fixed: 9 products

https://access.redhat.com/errata/RHSA-2026:19595

Open the full advisory

RHSA-2026:19596

Vulnerability from csaf_redhat - Published: 2026-05-20 11:23 - Updated: 2026-09-04 16:25

Summary

Red Hat Security Advisory: Red Hat build of Keycloak 26.4.12 Security Update

Severity

Important

Scope

10 vulnerabilities in this advisory, including CVE-2026-7507.

CVE-2026-7507

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:19596

Open the full advisory

RHSA-2026:19597

Vulnerability from csaf_redhat - Published: 2026-05-20 11:23 - Updated: 2026-08-31 02:00

Summary

Red Hat Security Advisory: Red Hat build of Keycloak 26.4.12 Images Security Update

Severity

Important

Scope

10 vulnerabilities in this advisory, including CVE-2026-7507.

CVE-2026-7507

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Fixed: 9 products

https://access.redhat.com/errata/RHSA-2026:19597

Open the full advisory

WID-SEC-W-2026-1612

Vulnerability from csaf_certbund - Published: 2026-05-19 22:00 - Updated: 2026-05-19 22:00

Summary

Keycloak: Mehrere Schwachstellen

Severity

Hoch

Scope

9 vulnerabilities in this advisory, including CVE-2026-7507.

CVE-2026-7507

Known affected: 2 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

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

Vulnerability from bitnami_vulndb

Tags

Sightings

Nomenclature