Is CVE-2026-34453 actively exploited?

No active exploitation of CVE-2026-34453 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34453 be exploited remotely?

Yes. CVE-2026-34453 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34453?

CVE-2026-34453 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-34453

HIGH

CVE-2026-34453

CWE-863Published: March 31, 2026· Updated: Apr 3, 2026

7.5

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.5th

Official Description

SiYuan is a personal knowledge management system. Prior to version 3.6.2, the publish service exposes bookmarked blocks from password-protected documents to unauthenticated visitors. In publish/read-only mode, /api/bookmark/getBookmark filters bookmark results by calling FilterBlocksByPublishAccess(nil, ...). Because the filter treats a nil context as authorized, it skips the publish password check and returns bookmarked blocks from documents configured as Protected. As a result, anyone who can access the publish service can retrieve content from protected documents without providing the required password, as long as at least one block in the document is bookmarked. This issue has been patched in version 3.6.2.

NVD Source

Technical Analysis

CVE-2026-34453 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.