CVE•Published 2026-08-17•Modified 2026-08-26•1 article on news•7 live references•NVD data
CVE-2026-74800
Vulnerability data via NVD (ingested)
CVSS v3.1
9.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
EPSS percentile
21
Exploit Prediction Scoring System · top 79% of all CVEs
Weaknesses (CWE)
Description
SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authenticated attackers can upload HTML files as assets and execute scripts with full kernel API access when the workspace owner opens the asset link.
Timeline
Published 2026-08-17
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-2026-74800Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-74800Censys host search filtered to this CVE id.
grep.app
CVE-2026-74800Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-74800GitHub code search for direct mentions.
Google dork
"CVE-2026-74800" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.