Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV N L N N P H L N 7.1 .0016 5.0 —
AFFECTED Product Versions Fixed siyuan unspecified 3.7.4
TIMELINE Aug 16 Reserved by VulnCheck Aug 17 Published (CNA: VulnCheck) Aug 28 RESCORED — CVE-2026-74802 (siyuan-note siyuan). CVSS 0 → 7.1 (NVD).
SiYuan versions before 3.7.4 contain a cross-site WebSocket hijacking vulnerability in the admin-only /ws/network/proxy endpoint that explicitly disables origin validation by setting CheckOrigin to unconditionally return true. Attackers can craft malicious webpages that establish WebSocket connections to this endpoint and direct the SiYuan kernel process to proxy arbitrary network traffic to attacker-chosen targets, enabling authenticated network pivoting through the victim's machine.
| Date | Event | Detail |
|---|---|---|
| August 16, 2026 | Reserved | Reserved by VulnCheck |
| August 17, 2026 | Published | Published (CNA: VulnCheck) |
| August 28, 2026 | RESCORED | RESCORED — CVE-2026-74802 (siyuan-note siyuan). CVSS 0 → 7.1 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| siyuan-note | siyuan | — | — | 3.7.4 |
Authoritative record: CVE-2026-74802 at cve.org
Vendors: siyuan-note
Weaknesses: CWE-346
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-74802 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 Sunday, October 4, 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.
