CVE•Published 2026-03-20•1 article on news•5 live references•NVD data
CVE-2026-33476
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
7.5
HIGH
EPSS percentile
87
Exploit Prediction Scoring System · top 13% of all CVEs
Description
SiYuan is a personal knowledge management system. Prior to version 3.6.2, the Siyuan kernel exposes an unauthenticated file-serving endpoint under `/appearance/*filepath.` Due to improper path sanitization, attackers can perform directory traversal and read arbitrary files accessible to the server process. Authentication checks explicitly exclude this endpoint, allowing exploitation without valid credentials. Version 3.6.2 fixes this issue.
Timeline
Published 2026-03-20
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).
Shodan · vuln tag0 hosts
vuln:CVE-2026-33476Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"B3log Siyuan" version:"0.1.0"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Siyuan"HTTP body or banner mentions "Siyuan" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-33476Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-33476Censys host search filtered to this CVE id.
grep.app
CVE-2026-33476Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-33476GitHub code search for direct mentions.
Google dork
"CVE-2026-33476" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.