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PatchSiren cyber security CVE debrief

CVE-2026-9091 Casdoor CVE debrief

A logic flaw in Casdoor versions 2.362.0 and earlier allows MFA bypass during social-login binding. The binding-rule code path in controllers/auth.go calls HandleLoggedIn directly without invoking checkMfaEnable, permitting authentication without enforced MFA.

Vendor
Casdoor
Product
Unknown
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-28
Original CVE updated
2026-05-29
Advisory published
2026-05-28
Advisory updated
2026-05-29

Who should care

Organizations using Casdoor for identity management with MFA requirements; security teams responsible for authentication infrastructure; developers maintaining Casdoor deployments

Technical summary

The vulnerability exists in the social-login binding flow where the binding-rule code path directly invokes HandleLoggedIn without calling checkMfaEnable. This omission allows users authenticating via this path to complete login without MFA verification, bypassing configured MFA requirements.

Defensive priority

high

Recommended defensive actions

  • Review Casdoor social-login binding implementation in controllers/auth.go
  • Verify MFA enforcement on all authentication code paths, particularly HandleLoggedIn invocations
  • Upgrade to Casdoor version beyond 2.362.0 when available
  • Audit authentication logs for unexpected MFA bypass events
  • Monitor CERT/CC advisory for vendor response

Evidence notes

NVD record published 2026-05-28T17:16:33.953Z, modified 2026-05-28T18:00:22.543Z. VulnStatus: Deferred. CERT/CC reference provided.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9091 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9091

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9091 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9091

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.