Keycloak: redirect_uri validation bypass

{
  "id": "b20573d8cdca0575884c7b5680c1d1d6f86a895c65c581d05a837d77cddf26f9",
  "url": "https://osv.dev/vulnerability/CVE-2023-6291",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Keycloak: redirect_uri validation bypass",
    "summary": "A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.",
    "evidence": "osv:CVE-2023-6291",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-6291",
      "aliases": [
        "CVE-2023-6291",
        "GHSA-mpwq-j3xf-7m5w"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/keycloak/keycloak",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0ccd72b0b06a6d30c17a8f951860be3d6de9dabf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "22.0.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.0.Test",
            "1.3.0.Final",
            "1.1.0.Beta2",
            "1.0.0.Final",
            "1.0-final",
            "1.0-rc-1",
            "1.0-beta-4",
            "1.0-beta-2",
            "1.0-beta-1",
            "1.0-alpha-3",
            "1.0-alpha-2",
            "1.0-alpha-1",
            "1.0-alpha-1-12062013"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-6291.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.947469769Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/downloads/content/package-browser/",
        "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
        "https://catalog.redhat.com/software/containers/",
        "https://access.redhat.com/errata/RHSA-2023:7854",
        "https://access.redhat.com/errata/RHSA-2023:7855",
        "https://access.redhat.com/errata/RHSA-2023:7856",
        "https://access.redhat.com/errata/RHSA-2023:7857",
        "https://access.redhat.com/errata/RHSA-2023:7858",
        "https://access.redhat.com/errata/RHSA-2023:7860",
        "https://access.redhat.com/errata/RHSA-2023:7861",
        "https://access.redhat.com/errata/RHSA-2024:0798",
        "https://access.redhat.com/errata/RHSA-2024:0799",
        "https://access.redhat.com/errata/RHSA-2024:0800",
        "https://access.redhat.com/errata/RHSA-2024:0801",
        "https://access.redhat.com/errata/RHSA-2024:0804",
        "https://access.redhat.com/security/cve/CVE-2023-6291",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6291.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-6291",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2251407"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-601"
        ],
        "cna_assigner": "redhat",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "22.0.7-1"
                  },
                  {
                    "fixed": "22-6"
                  },
                  {
                    "fixed": "22-9"
                  },
                  {
                    "fixed": "0:18.0.11-2.redhat_00003.1.el7sso"
                  },
                  {
                    "fixed": "0:18.0.12-1.redhat_00001.1.el7sso"
                  },
                  {
                    "fixed": "0:18.0.11-2.redhat_00003.1.el8sso"
                  },
                  {
                    "fixed": "0:18.0.12-1.redhat_00001.1.el8sso"
                  },
                  {
                    "fixed": "0:18.0.11-2.redhat_00003.1.el9sso"
                  },
                  {
                    "fixed": "0:18.0.12-1.redhat_00001.1.el9sso"
                  },
                  {
                    "fixed": "7.6-38"
                  },
                  {
                    "fixed": "7.6.6-2"
                  },
                  {
                    "fixed": "7.6-41"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "InverseAffectedRanges"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6291.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-6291",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521853,
  "published_at": "2024-01-26T14:23:43.185+00:00"
}