CVE-2026-90942

Casdoor through 4.4.0 Private Key Exposure via Certificate Endpoints

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

casdoor

CVSS v4.0 VULNCHECK

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

9.6 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS

0.28% chance of exploitation in the next 30 days, 19th percentile

Published

2026-09-14

Updated

2026-09-24

Proof-of-concept exploits (1)

• geo-chen/oss/blob/main/casdoor.md#finding-3-organization-admin-can-read-the-global-built-…

References

• CVE Record
• NVD entry