CVE•Published 2026-08-21•Modified 2026-08-26•1 article on news•6 live references•NVD data
CVE-2026-77086
Vulnerability data via NVD (ingested)
CVSS v3.1
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS percentile
48
Exploit Prediction Scoring System · top 52% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2026-08-21
Modified 2026-08-26
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-77086Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-77086Censys host search filtered to this CVE id.
grep.app
CVE-2026-77086Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-77086GitHub code search for direct mentions.
Google dork
"CVE-2026-77086" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.