CVE-2026-91998Network attack vector

Cross-organization user administration via unconditional application authorization

Published Sep 15, 2026 · Updated Sep 15, 2026

Authorization bypass in Casdoor 4.4.0 and earlier allows remote authenticated users to administer users across all organizations. The IsAllowed function in authz/authz.go returns true for every application principal before tenant or API permission checks run. Any application's valid client ID and secret therefore suffice to enumerate user records, including email addresses and password salts, or to create, modify, and delete users in other organizations.

CVSS severityUnavailable
Unscored
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Casdoor 4.4.0 and earlier allows remote authenticated users to administer users across all organizations. The IsAllowed function in authz/authz.go returns true for every application principal before tenant or API permission checks run. Any application's valid client ID and secret therefore suffice to enumerate user records, including email addresses and password salts, or to create, modify, and delete users in other organizations.

The record

CVE
CVE-2026-91998
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Casdoor
Product
Casdoor
Classifications
T1087, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Casdoor · Casdoorversion=0 <=4.4.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1087Account Discovery
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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