GHSA-3W4H-G9F5-J84P

Vulnerability from github – Published: 2026-05-28 18:30 – Updated: 2026-07-02 18:37
VLAI
Summary
Casdoor does not validate the AudienceRestriction element in SAML assertions
Details

In Casdoor versions 2.362.0 and earlier, the SAML service provider implementation does not validate the AudienceRestriction element in SAML assertions. The buildSp function in object/saml_sp.go never sets AudienceURI on the gosaml2 SAMLServiceProvider struct and never inspects WarningInfo.NotInAudience. This allows assertions issued for other service providers to be accepted by Casdoor.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/casdoor/casdoor"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.1000.1-0.20260321120606-239e8bd69487"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-9093"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-02T18:37:12Z",
    "nvd_published_at": "2026-05-28T17:16:34Z",
    "severity": "CRITICAL"
  },
  "details": "In Casdoor versions 2.362.0 and earlier, the SAML service provider implementation does not validate the AudienceRestriction element in SAML assertions. The buildSp function in object/saml_sp.go never sets AudienceURI on the gosaml2 SAMLServiceProvider struct and never inspects WarningInfo.NotInAudience. This allows assertions issued for other service providers to be accepted by Casdoor.",
  "id": "GHSA-3w4h-g9f5-j84p",
  "modified": "2026-07-02T18:37:13Z",
  "published": "2026-05-28T18:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9093"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/casdoor/casdoor"
    },
    {
      "type": "WEB",
      "url": "https://kb.cert.org/vuls/id/780781"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Casdoor  does not validate the AudienceRestriction element in SAML assertions"
}



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