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CVE-2026-90942

Casdoor through 4.4.0 Private Key Exposure via Certificate Endpoints

CRITICAL
9.6
CVSS Score
Published: September 14, 2026 at 05:52 PM UTC
Updated: September 23, 2026 at 05:30 PM UTC
2 products affected across 2 vendorsCasdoorCasdoor

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Severity
CRITICAL9.6
Exploit prediction
EPSS 0.3%
SSVC
PoC

Description

Casdoor through 4.4.0 fails to properly mask the instance-wide built-in certificate private key in /api/get-certs and /api/get-cert endpoints, allowing organization administrators to retrieve it. Attackers can use the exposed private key to forge JWT tokens for any user in any organization, including global administrators.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Casdoor· Casbin
95%
v ≤ 4.4.0
Casdoor· Casdoor
60%
v ≤ 4.4.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Third Party AdvisoryExploit
Source: cverecord
https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-3-organization-admin-can-read-the-global-built-in-jwt-signing-private-key-via-apiget-certs-and-apiget-cert-incomplete-fix-of-3003--enables-cross-organization-token-forgery
Technical Description
Source: cverecord
https://github.com/casdoor/casdoor/blob/v4.4.0/controllers/cert.go
Technical Description
Source: cverecord
https://github.com/casdoor/casdoor/blob/v4.4.0/object/cert.go
Product
Source: cverecord
https://github.com/casdoor/casdoor
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/casdoor-through-4.4.0-private-key-exposure-via-certificate-endpoints

SSVC — Action Prioritization

SSVCPoCAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.6CRITICALVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-863

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