SiYuan: The publish filter for database backlinks consults the forbidden list instead of the visibility list, disclosing hidden-tier documents to anonymous readers

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the getAttributeViewBacklinks endpoint that consults the forbidden access list instead of the visibility list when filtering backlinks. Anonymous readers can supply a publicly visible database row identifier to discover hidden-tier documents that reference it, receiving the database name, row title, and document path of hidden documents.

[ Fixes ]Fixes and patches

• github.com/siyuan-note/siyuan/kernel 0.0.0-20260730150429-5b42614311b0Fixed version · GitHub Advisories · go package github.com/siyuan-note/siyuan/kernel: upgrade to 0.0.0-20260730150429-5b42614311b0 or later (affected < 0.0.0-20260730150429-5b42614311b0)

[ Packages ]Affected open-source packages

• github.com/siyuan-note/siyuan/kernel goAffected < 0.0.0-20260730150429-5b42614311b0 · fixed in 0.0.0-20260730150429-5b42614311b0 · GHSA-p4qw-vx5p-g984

[ References ]References

• github.com/siyuan-note/siyuan/security/advisories/GHSA-p4qw-vx5p-g984vendor-advisory
• www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getattributeviewb…third-party-advisory