by Kastro
Paper/Archive/CVE-2026-77086

CVE-2026-77086

siyuan-note siyuan — SiYuan before v3.7.4 Path Traversal via packageName

EPSS 1%CVSS 9.4
critical.is priorityof 100
41
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 63.6.636 × 2012.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
siyuan< 3.7.43.7.4CNA

Scores by source

VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/siyuan-note/siyuan/security/advisories/GHSA-wr4w-7vjm-mmx3writeupvulncheck.com/advisories/siyuan-before-path-traversal-via-packagename