CVE-2026-77086

CVSS 9.4 (critical) · published 2026-08-21

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.

Weakness: CWE-22

Source: NVD CVE-2026-77086

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wr4w-7vjm-mmx3
• https://www.vulncheck.com/advisories/siyuan-before-path-traversal-via-packagename

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