GHSA-34fj-mwm6-fjfg: github.com/siyuan-note/siyuan/kernel (CVE-2026-72794)

SiYuan: The session-cookie signing key (Conf.CookieKey) is returned to anonymous readers by /api/system/getConf

CVSS 9.2 CriticalCriticalEPSS 0.0032 · 25th percentile

Critical, because:

CVSS score 9.2: 9.0 or more.

Published by the GitHub Advisory Database at 4 Sept 2026, 21:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/siyuan-note/siyuan/kernel	Go	<0.0.0-20260725123945-77421530be4a	0.0.0-20260725123945-77421530be4a

Identifiers

GHSA-34fj-mwm6-fjfg · CVE-2026-72794 · GO-2026-6420

Weakness (CWE)

CWE-522

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

SiYuan kernel versions before 0.0.0-20260725123945-77421530be4a return the session-cookie signing key from the getConf API. In publish mode, an anonymous user (when publish auth is off) or any publish reader can read the key and forge session cookies. Upgrade to 0.0.0-20260725123945-77421530be4a or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.2	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0032, the 25th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:13 UTC First seen by agentprime
31 Oct 2026, 14:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.