CVE-2026-73056
Auth bypass allows unlimited token brute-force to gain admin access
Is CVE-2026-73056 being exploited?
Not confirmed. CVE-2026-73056 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 0.45% probability of exploitation in the next 30 days.
How severe is CVE-2026-73056?
CVE-2026-73056 is rated Critical with a CVSS score of 9.3. 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-2026-73056?
Yes. A fix has been recorded for CVE-2026-73056. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-73056 affect?
CVE-2026-73056 affects SiYuan kernel < 3.7.4, SiYuan apps using Conf.Api.Token, APIs accepting Authorization header or ?token=. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-73056?
Upgrade to SiYuan 3.7.4+, rotate tokens, enforce strong tokens and lockouts
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can brute-force API token to gain RoleAdministrator, enabling arbitrary file operations and SQL queries.
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.