Vulnerability · Published Aug 22, 2026 · Assigned by VulnCheck

CVE-2026-62204SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install

Medium 6.6

In plain English

A medium-severity insufficient verification of data authenticity in siyuan from siyuan-note. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.6Medium

Exploit odds (30 days)<0.1%top 99.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

SiYuan versions before v3.7.4 fail to validate that packageName matches the downloaded package content in bazaar install endpoints. Attackers with same-origin access can overwrite existing trusted plugins by supplying mismatched packageName and repoURL parameters, achieving persistence across application restarts.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260808010544-26ccb40d390e	GHSA-rpx2-p6hp-x5gj
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260808010544-26ccb40d390e	GO-2026-6834

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.7.4

Weakness: CWE-345 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L

References

GitHub Security Advisory (GHSA-rpx2-p6hp-x5gj) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install third-party-advisory