CVE-2026-34585
Stored XSS leading to RCE in SiYuan Electron client via crafted .sy.zip (pre-3.6.2).
Is CVE-2026-34585 being exploited?
Not confirmed. CVE-2026-34585 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 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2026-34585?
CVE-2026-34585 is rated High with a CVSS score of 8.6. 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-2026-34585?
Yes. A fix has been recorded for CVE-2026-34585. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-34585 affect?
CVE-2026-34585 affects SiYuan (pre-3.6.2) desktop Electron client, SiYuan .sy.zip import workflow. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-34585?
Upgrade to 3.6.2+; verify .sy.zip imports.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted IAL in .sy.zip causes stored XSS; in Electron app, injected JS runs with Node/Electron access, enabling RCE.
Patch when possible
- affected< 3.6.2
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.