by Kastro
Paper/Archive/CVE-2026-90942

CVE-2026-90942

casdoor casdoor — Casdoor through 4.4.0 Private Key Exposure via Certificate Endpoints

EPSS 0.3%public exploitCVSS 9.6
critical.is priorityof 100
43
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 20.2.202 × 204.0Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
casdoor≤ 4.4.0–CNA

Scores by source

VulnCheck (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.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-forgerywriteupgithub.com/casdoor/casdoor/blob/v4.4.0/controllers/cert.gowriteupgithub.com/casdoor/casdoor/blob/v4.4.0/object/cert.gorefgithub.com/casdoor/casdoorwriteupvulncheck.com/advisories/casdoor-through-4.4.0-private-key-exposure-via-certificate-endpoints