CVE-2026-74868
Unthrottled brute-force on SiYuan publish service allows account access
Is CVE-2026-74868 being exploited?
Not confirmed. CVE-2026-74868 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.38% probability of exploitation in the next 30 days.
How severe is CVE-2026-74868?
CVE-2026-74868 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74868?
Yes. A fix has been recorded for CVE-2026-74868. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74868 affect?
CVE-2026-74868 affects SiYuan < 3.7.4, SiYuan Publish Service (kernel/server/proxy/publish.go), Default listener TCP 6808. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74868?
Upgrade to SiYuan 3.7.4+ or block/restrict TCP 6808 and enable rate-limiting/backoff.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote attackers can brute-force Basic Auth on the Publish Service to takeover publish-viewer accounts and access published notes/notebooks.
Immediate action required
- affected< 3.7.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.