CVE-2026-77086
Authenticated admin path traversal in SiYuan Bazaar allows arbitrary file write or recursive delete.
Is CVE-2026-77086 being exploited?
Not confirmed. CVE-2026-77086 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 0.65% probability of exploitation in the next 30 days.
How severe is CVE-2026-77086?
CVE-2026-77086 is rated Critical with a CVSS score of 9.4. 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-2026-77086?
Yes. A fix has been recorded for CVE-2026-77086. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-77086 affect?
CVE-2026-77086 affects SiYuan < 3.7.4, SiYuan Bazaar install endpoint, SiYuan Bazaar uninstall endpoint. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-77086?
Upgrade to SiYuan v3.7.4+, restrict admin access, audit file operations
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated administrators can use packageName path traversal to write arbitrary files anywhere or recursively delete directories.
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.