CVE-2026-62204
SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install
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.
INFO
Published Date :
Aug. 22, 2026, 1:16 p.m.
Last Modified :
Oct. 12, 2026, 4:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update SiYuan to version 3.7.4 or later.
- Verify plugin installation process integrity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-62204.
| URL | Resource |
|---|---|
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rpx2-p6hp-x5gj | |
| https://www.vulncheck.com/advisories/siyuan-before-plugin-overwrite-via-bazaar-install |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62204 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-62204
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-62204 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62204 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 12, 2026
Action Type Old Value New Value Added Translation Title: siyuan de siyuan-note, Description: Las versiones de SiYuan anteriores a la v3.7.4 no validan que packageName coincida con el contenido del paquete descargado en los puntos finales de instalación de bazaar. Los atacantes con acceso de mismo origen pueden sobrescribir plugins confiables existentes al proporcionar parámetros packageName y repoURL no coincidentes, logrando persistencia a través de los reinicios de la aplicación. -
CVE Modified by [email protected]
Aug. 26, 2026
Action Type Old Value New Value Added Reference https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rpx2-p6hp-x5gj Added Reference https://www.vulncheck.com/advisories/siyuan-before-plugin-overwrite-via-bazaar-install Removed Reference https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rpx2-p6hp-x5gj Removed Reference https://www.vulncheck.com/advisories/siyuan-before-plugin-overwrite-via-bazaar-install -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 26, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-62204', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-26T17:53:08.661591Z'} -
New CVE Received by [email protected]
Aug. 22, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'siyuan-note', 'product': 'siyuan', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '3.7.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '3.7.4', 'versionType': 'semver'}], 'packageURL': 'pkg:golang/github.com/siyuan-note/siyuan', 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L Added CWE CWE-345 Added Reference https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rpx2-p6hp-x5gj Added Reference https://www.vulncheck.com/advisories/siyuan-before-plugin-overwrite-via-bazaar-install