Security advisory

{
  "id": "d8ca7984f8a7b66b3a71a691632de88085de20b1858a409d08169f78148d57ee",
  "url": "https://osv.dev/vulnerability/CVE-2021-23365",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-23365",
    "summary": "The package github.com/tyktechnologies/tyk-identity-broker before 1.1.1 are vulnerable to Authentication Bypass via the Go XML parser which can cause SAML authentication bypass. This is because the XML parser doesn’t guarantee integrity in the XML round-trip (encoding/decoding XML data).",
    "evidence": "osv:CVE-2021-23365",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-23365",
      "aliases": [
        "CVE-2021-23365",
        "GHSA-599h-8wpj-75xj",
        "GO-2022-0906",
        "SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKIDENTITYBROKER-1089720"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tyktechnologies/tyk-identity-broker",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "215a4d092e068ab55733e4b9b5bcf11d5dedde38"
                },
                {
                  "fixed": "243092965b0f93a95a14cb882b5b9a3df61dd5c0"
                },
                {
                  "fixed": "46f70420e0911e4e8b638575e29d394c227c75d0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:tyk:tyk-identity-broker:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.1.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "243092965b0f93a95a14cb882b5b9a3df61dd5c0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "46f70420e0911e4e8b638575e29d394c227c75d0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "215a4d092e068ab55733e4b9b5bcf11d5dedde38"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.1.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.0",
            "v0.7.1",
            "v1.0.0-rc1",
            "v0.7.0",
            "v0.6.1",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.0",
            "v0.2.1",
            "v0.2",
            "v0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23365.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:32.639310506Z",
      "provider": "osv",
      "references": [
        "https://github.com/TykTechnologies/tyk-identity-broker/releases/tag/v1.1.1",
        "https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKIDENTITYBROKER-1089720",
        "https://github.com/TykTechnologies/tyk-identity-broker/commit/243092965b0f93a95a14cb882b5b9a3df61dd5c0",
        "https://github.com/TykTechnologies/tyk-identity-broker/commit/46f70420e0911e4e8b638575e29d394c227c75d0",
        "https://github.com/TykTechnologies/tyk-identity-broker/pull/147"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-23365",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385537,
  "published_at": "2021-04-26T10:15:12.597+00:00"
}