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CVE-2026-9094 — Vulnerability in github.com/casdoor/casdoor — CVE...

CRITICAL

Casdoor: GetTokenExchangeToken bypass through lack of cross-organization JWT signature check

Published May 28, 2026Updated July 21, 2026Source: osv

Summary

Casdoor versions 2.362.0 and earlier contain a vulnerability enabling cross-organization token exchange. The GetTokenExchangeToken function in object/token_oauth.go validates JWT signatures but does not verify that the token's user belongs to the same organization as the target application. This can result in privilege escalation across organizational boundaries.

Advisory Timeline

  • First published May 28, 2026 (137 days ago).
  • Last revised July 21, 2026 — 54 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Go
Update github.com/casdoor/casdoor to 2.387.0 or later
go get github.com/casdoor/casdoor@v2.387.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: go (1).

PackageEcosystemAffectedFixed In
github.com/casdoor/casdoor
go
All versions2.387.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-269
    Improper Privilege ManagementMITRE
  • CWE-863
    Incorrect AuthorizationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2026-9094?
Casdoor: GetTokenExchangeToken bypass through lack of cross-organization JWT signature check This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-9094?
CVE-2026-9094 affects github.com/casdoor/casdoor. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-9094 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-c9w5-qp6m-m395
GO-2026-5953

Related CVEs

  • CVE-2026-9097
    CRITICAL

    Casdoor doesn't verify that a JWT used for token exchange is still active

  • CVE-2026-9093
    CRITICAL

    Casdoor does not validate the AudienceRestriction element in SAML assertions

  • CVE-2026-9090
    CRITICAL

    Casdoor has an authentication bypass

  • CVE-2026-9098
    CRITICAL

    Casdoor SAML callback handler accepts any well-formed SAMLResponse sent to /api/acs without verifying that it corresponds to an AuthnRequest

  • CVE-2026-107806
    CRITICAL

    Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite

  • CVE-2026-68582
    CRITICAL

    Vikunja: Link-share token reads any tenant's kanban buckets and enumerates usernames/IDs instance-wide (BOLA)

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