cve.bz

CVE-2026-54069

9.2 criticalEPSS 0.6%

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 fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806, enabling data exfiltration, stored XSS injection, and configuration tampering. This vulnerability is fixed in 3.7.0.

CVSS 4.0
9.2CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-25)
CWE
CWE-346
Published
Modified
Record from
the NVD, synced

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-hvr9-72v2-fff3Gogithub.com/siyuan-note/siyuan/kernel<0.0.0-20260628153353-2d5d72223df40.0.0-20260628153353-2d5d72223df4
GO-2026-5961Gogithub.com/siyuan-note/siyuan/kernel<0.0.0-20260628153353-2d5d72223df40.0.0-20260628153353-2d5d72223df4

References

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