CVE-2026-54069
Untrusted Chrome extensions gain admin API access to SiYuan kernel.
Is CVE-2026-54069 being exploited?
Not confirmed. CVE-2026-54069 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 0.58% probability of exploitation in the next 30 days.
How severe is CVE-2026-54069?
CVE-2026-54069 is rated Critical with a CVSS score of 9.2. 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-2026-54069?
Yes. A fix has been recorded for CVE-2026-54069. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-54069 affect?
CVE-2026-54069 affects SiYuan Note kernel (pre-3.7.0). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-54069?
Upgrade to 3.7.0+ immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Bypass admin auth; attacker extension can exfiltrate data, perform stored XSS, and tamper config via local admin API (127.0.0.1:6806).
Immediate action required
- affected< 3.7.0
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.