Vulnerability-Lookup

CVE-2026-9091 (GCVE-0-2026-9091)

Vulnerability from cvelistv5 – Published: 2026-05-28 16:19 – Updated: 2026-05-29 19:01

Title

CVE-2026-9091

Summary

Casdoor versions 2.362.0 and earlier contain a logic flaw in the social‑login binding flow that allows users to bypass configured MFA requirements. The binding‑rule code path in controllers/auth.go calls HandleLoggedIn directly without invoking checkMfaEnable. Any user authenticating via this path is logged in without MFA enforcement.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-29 19:01 UTC

CWE

CWE-306 Missing Authentication for Critical Function

Assigner

certcc mitre root

References

1 reference

URL	Tags
https://kb.cert.org/vuls/id/780781

Impacted products

1 product

Vendor	Product	Version	CPE status
Casdoor	Casdoor	Affected: 0 , ≤ 2.362.0 (custom)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
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              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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            }
          },
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                "options": [
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                  },
                  {
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
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                "timestamp": "2026-05-29T19:01:45.674578Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-29T19:01:52.614Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "product": "Casdoor",
          "vendor": "Casdoor",
          "versions": [
            {
              "lessThanOrEqual": "2.362.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
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        {
          "lang": "en",
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-306 Missing Authentication for Critical Function",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T16:19:39.239Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://kb.cert.org/vuls/id/780781"
        }
      ],
      "source": {
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      },
      "title": "CVE-2026-9091",
      "x_generator": {
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
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    "datePublished": "2026-05-28T16:19:39.239Z",
    "dateReserved": "2026-05-20T15:04:03.933Z",
    "dateUpdated": "2026-05-29T19:01:52.614Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "cve": "CVE-2026-9091",
      "date": "2026-09-17",
      "epss": "0.00322",
      "percentile": "0.25293"
    },
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      "cve": "CVE-2026-9091",
      "id": "CVE-2026-9091",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2026-9091",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9091.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-31T00:52:27Z",
      "cve": "CVE-2026-9091",
      "id": "CVE-2026-9091",
      "initial_release_date": "2026-07-31T00:52:27Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-9091",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-9091.json",
      "version": "2"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-9091\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-29T19:01:45.674578Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-29T19:01:34.648Z\"}}], \"cna\": {\"title\": \"CVE-2026-9091\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"affected\": [{\"vendor\": \"Casdoor\", \"product\": \"Casdoor\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"2.362.0\"}]}], \"references\": [{\"url\": \"https://kb.cert.org/vuls/id/780781\"}], \"x_generator\": {\"env\": \"prod\", \"engine\": \"VINCE 3.0.41\", \"origin\": \"https://cveawg.mitre.org/api/cve/CVE-2026-9091\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Casdoor versions 2.362.0 and earlier contain a logic flaw in the social\\u2011login binding flow that allows users to bypass configured MFA requirements. The binding\\u2011rule code path in controllers/auth.go calls HandleLoggedIn directly without invoking checkMfaEnable. Any user authenticating via this path is logged in without MFA enforcement.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-306 Missing Authentication for Critical Function\"}]}], \"providerMetadata\": {\"orgId\": \"37e5125f-f79b-445b-8fad-9564f167944b\", \"shortName\": \"certcc\", \"dateUpdated\": \"2026-05-28T16:19:39.239Z\"}}}",
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}

FKIE_CVE-2026-9091

Vulnerability from fkie_nvd - Published: 2026-05-28 17:16 - Updated: 2026-06-17 11:04

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	cret@cert.org	https://kb.cert.org/vuls/id/780781

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Casdoor",
          "vendor": "Casdoor",
          "versions": [
            {
              "lessThanOrEqual": "2.362.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cret@cert.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Casdoor versions 2.362.0 and earlier contain a logic flaw in the social\u2011login binding flow that allows users to bypass configured MFA requirements. The binding\u2011rule code path in controllers/auth.go calls HandleLoggedIn directly without invoking checkMfaEnable. Any user authenticating via this path is logged in without MFA enforcement."
    }
  ],
  "id": "CVE-2026-9091",
  "lastModified": "2026-06-17T11:04:48.930",
  "metrics": {
    "cvssMetricV31": [
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
            {
              "exploitation": "none"
            },
            {
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            },
            {
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            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-29T19:01:45.674578Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-28T17:16:33.953",
  "references": [
    {
      "source": "cret@cert.org",
      "url": "https://kb.cert.org/vuls/id/780781"
    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Deferred"
}

GHSA-GV4M-V8C8-HR3G

Vulnerability from github – Published: 2026-05-28 18:30 – Updated: 2026-07-02 18:36

Summary

Casdoor allows users to bypass configured MFA requirements

Details

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "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-2026-9091"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-02T18:36:38Z",
    "nvd_published_at": "2026-05-28T17:16:33Z",
    "severity": "MODERATE"
  },
  "details": "Casdoor versions 2.362.0 and earlier contain a logic flaw in the social\u2011login binding flow that allows users to bypass configured MFA requirements. The binding\u2011rule code path in controllers/auth.go calls HandleLoggedIn directly without invoking checkMfaEnable. Any user authenticating via this path is logged in without MFA enforcement.",
  "id": "GHSA-gv4m-v8c8-hr3g",
  "modified": "2026-07-02T18:36:38Z",
  "published": "2026-05-28T18:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9091"
    },
    {
      "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:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Casdoor allows users to bypass configured MFA requirements"
}

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-9091 (GCVE-0-2026-9091)

FKIE_CVE-2026-9091

GHSA-GV4M-V8C8-HR3G

Tags

Sightings

Nomenclature

Related by attack behaviour