Is CVE-2026-85579 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-85579?

CVE-2026-85579 has a CVSS v3 severity of MEDIUM (4.3).

Back

CVE-2026-85579

Description

SiYuan is affected by an information disclosure vulnerability (confirmed in v3.8.1, fixed in v3.8.2) in the reader-accessible POST /api/transactions/undoState endpoint. The endpoint returns the peekMutatedRootIDs list from the global undo-log stack for a caller-supplied root ID without applying publish-access visibility filtering. An authenticated reader who knows the root ID of a visible document can obtain the internal root IDs of other documents (including private or unpublished ones) modified in the same cross-document transaction, disclosing internal identifiers and cross-document relationships. Document body contents are not directly exposed.