CVE-2026-54069: SiYuan is an open-source personal knowledge management system

Q: How do I fix CVE-2026-54069?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Q: Is CVE-2026-54069 being exploited?

CVE-2026-54069 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-54069 affect?

CVE-2026-54069 affects affected software. Severity is critical (CVSS 9.2). SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note's kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension w

Q: How urgent is CVE-2026-54069?

Priority 52/100. Critical severity; CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

This month

CRITICAL 9.2REMOTE

CVE-2026-54069 is a critical-severity flaw (CVSS 9.2) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note's kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension without any authentication. Combined with the default empty AccessAuthCode on desktop installs, any Chrome/Chromium extension -- including a compromised legitimate extension via supply chain attack -- can make f

Why this priority

Critical severity
CISA SSVC: public proof of concept
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.2 (Critical)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-346
Published	2026-06-24
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-06-24 22:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

Exact fixes by distribution

Go · github.com/siyuan-note/siyuan/kernel · FIXED · 0.0.0-20260628153353-2d5d72223df4 · vulnerable: < 0.0.0-20260628153353-2d5d72223df4 · source

go get github.com/siyuan-note/siyuan/kernel@v0.0.0-20260628153353-2d5d72223df4 go list -m github.com/siyuan-note/siyuan/kernel

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: SiYuan Note <= 3.6.5 - Authentication Bypass

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54069?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-54069 being exploited?

CVE-2026-54069 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54069 affect?

CVE-2026-54069 affects affected software. Severity is critical (CVSS 9.2). SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note's kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension w

How urgent is CVE-2026-54069?

Priority 52/100. Critical severity; CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

Software pages

Google Chrome vulnerabilities · Chromium vulnerabilities

References

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