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CVE-2026-72794 CRITICAL CVSS 9.2 siyuan Verified Advisory

Session cookie signing key disclosure in siyuan via getConf endpoint (CVE-2026-72794)

The POST /api/system/getConf endpoint in siyuan returns the server's session cookie signing key (Conf.CookieKey) in its response body to unauthenticated users when publish mode is enabled with authentication disabled, or to any publish reader account otherwise. An attacker who retrieves this key can forge arbitrary session cookies that the server accepts as authentic, enabling session impersonation and potential administrative access. Affected versions: - <=v3.7.2 We recommend updating to: v3.7.4. CVSS 9.2 · our assessment: act_now Reference: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-34fj-mwm6-fjfg Details: https://vuln.today/cve/CVE-2026-72794

Verified by vuln.today against published advisories.

Affected versions

  • – <=v3.7.2

Fixed in: v3.7.4

Full CVE analysis Reference Published Aug 12, 2026

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