Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-90942

CVE-2026-90942CRITICAL

Casdoor through 4.4.0 Private Key Exposure via Certificate Endpoints

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   L   N   H   H   N    9.3   .0028   18.3     —

AFFECTED
  Product  Versions     Fixed
  casdoor  unspecified  —

TIMELINE
  Sep 14  Reserved by VulnCheck
  Sep 14  Published (CNA: VulnCheck)
  Sep 24  EXPLOIT PUBLISHED — CVE-2026-90942 (casdoor). Public exploit reference added.

CWE-863 · CNA: VulnCheck · CVSS v4.0 · 5 references · NVD status: Deferred

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 14, 2026	Reserved	Reserved by VulnCheck
September 14, 2026	Published	Published (CNA: VulnCheck)
September 24, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-90942 (casdoor). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
casdoor	casdoor	—	—	—

Weaknesses

CWE-863

References (5)

https://github.com/casdoor/casdoor [product]
https://github.com/casdoor/casdoor/blob/v4.4.0/controllers/cert.go [technical-description]
https://github.com/casdoor/casdoor/blob/v4.4.0/object/cert.go [technical-description]
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 [third-party-advisory, exploit]
https://www.vulncheck.com/advisories/casdoor-through-4.4.0-private-key-exposure-via-certificate-endpoints [third-party-advisory]

Authoritative record: CVE-2026-90942 at cve.org

Vendors: casdoor

Weaknesses: CWE-863

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-90942 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.