CVE-2026-62204CWE-345

CVE-2026-62204

Medium · published August 22, 2026

CVSS v3.1
6.6
EPSS
0%
Percentile
0.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.6 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L
CVSS v4.0
5.9 · CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L
EPSS
0.00094 · 0.6th percentile
Weakness
CWE-345 · Insufficient Verification of Data Authenticity
Published
2026-08-22T17:16Z
References (2)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rpx2-p6hp-x5gj · [email protected]https://www.vulncheck.com/advisories/siyuan-before-plugin-overwrite-via-bazaar-install · [email protected]
EPSS history
Timeline
  • 22 AUG 12:26Z
    SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install
    cvelistv5