Vulnerability · Published Aug 12, 2026 · Assigned by VulnCheck

CVE-2026-72793SiYuan before v3.7.4 Information Disclosure via /api/system/getConf

High 8.6

In plain English

A high-severity security flaw in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)0.3%top 76.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

SiYuan versions before v3.7.4 fail to mask sensitive configuration fields in the /api/system/getConf endpoint, allowing anonymous or publish-reader users to obtain the session-cookie signing key, OS username via pandoc path, and encrypted-notebook key material. Attackers can forge and tamper with session cookies to impersonate users, and on instances without access-auth codes configured, escalate to administrator privileges.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260725132049-2d8b98395a91	GHSA-h4v5-crx2-3cv4
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260725132049-2d8b98395a91	GO-2026-6424

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.7.4

Weakness: CWE-522 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-h4v5-crx2-3cv4) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.4 Information Disclosure via /api/system/getConf third-party-advisory