CVE-2026-77086: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in siyuan-note siyuan
SiYuan before v3.7.4 fails to validate the packageName parameter in Bazaar install and uninstall endpoints, allowing authenticated administrators to perform path traversal via directory traversal sequences. Attackers with admin access can write arbitrary files to any location via install operations or recursively delete directories via uninstall operations by supplying crafted packageName values.
CVE-2026-77086: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in siyuan-note siyuan
Description
SiYuan before v3.7.4 fails to validate the packageName parameter in Bazaar install and uninstall endpoints, allowing authenticated administrators to perform path traversal via directory traversal sequences. Attackers with admin access can write arbitrary files to any location via install operations or recursively delete directories via uninstall operations by supplying crafted packageName values.
CVSS v4.0
Score 9.4critical
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-20T10:55:09.093Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a883514acd9273b490dfd6a
Added to database: 08/21/2026, 11:23:00 UTC
Last updated: 08/21/2026, 11:23:00 UTC
Views: 1
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