CVE-2026-72811
SQL injection in SiYuan backlink search allows arbitrary SQL on main DB
Is CVE-2026-72811 being exploited?
Not confirmed. CVE-2026-72811 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 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-72811?
CVE-2026-72811 is rated Critical with a CVSS score of 9.9. 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-2026-72811?
Yes. A fix has been recorded for CVE-2026-72811. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72811 affect?
CVE-2026-72811 affects SiYuan <= v3.7.2, siyuan.db (main read-write handle), backlink/mention search component. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72811?
Upgrade to v3.7.4+, restrict publish access, and audit databases
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted backlink/search input lets an attacker execute arbitrary SQL on siyuan.db, enabling cross-notebook read/write and data tampering.
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.