Auth bypass in Casdoor
CVE-2026-90942
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/geo-chen/oss/blob/main/casdoor.md (exploit, third-party-advisory)
- github.com/casdoor/casdoor/blob/v4.4.0/controllers/cert.go (technical-description)
- github.com/casdoor/casdoor/blob/v4.4.0/object/cert.go (technical-description)
- github.com/casdoor/casdoor (product)
- www.vulncheck.com/advisories/casdoor-through-4.4.0-private-key-exposure-via-cer… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-90942?
- CVE-2026-90942 is a critical-severity vulnerability in Casdoor, classified under Incorrect Authorization. CVSS score: 9.6/10. Published 2026-09-14.
- How severe is CVE-2026-90942?
- Critical severity. CVSS v3 base score is 9.6 out of 10.