CVE-2026-73054
Auth bypass in SiYuan WebSocket allows unauthenticated access to live kernel event stream.
Is CVE-2026-73054 being exploited?
Not confirmed. CVE-2026-73054 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 0.31% probability of exploitation in the next 30 days.
How severe is CVE-2026-73054?
CVE-2026-73054 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-2026-73054?
Yes. A fix has been recorded for CVE-2026-73054. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-73054 affect?
CVE-2026-73054 affects SiYuan < v3.7.4. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-73054?
Upgrade to SiYuan v3.7.4+, restrict WebSocket access and apply network/WAF controls.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attackers can bypass auth using crafted WebSocket URIs to receive live kernel events including document IDs, titles, and operation logs.
Patch when possible
- 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.