P4Verified

CVE-2026-77086: siyuan 0 to before 3.7.4

CVE-2026-77086. CVSS 3.1 base score 9.1 (CRITICAL, Vendor/CNA). EPSS 0.01028 (percentile 0.62962), scored 15-Oct-2026.

Affected technology

siyuan · 0 to before 3.7.4
siyuan-note

Description’s affected range: before v3.7.4 fails to validate the packageName parameter in Bazaar install and uninstall endpoints

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · High privileges required · No user interaction required

What an attacker can do

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. Vendor/CNA’s CVSS 4.0 assessment (base score 9.4/10) rates confidentiality, integrity and availability impact as high.

Published 16-Oct-2026 13:26 UTC

CWE: CWE-22
CCR priority: 36.7 /100 (P4)
CVSS 3.1: 9.1 /10 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H · Vendor/CNA
EPSS: 0.01028 · percentile 0.62962 · 2026-10-15
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-16 13:24:58.261210+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-77086.html