CVE-2026-93921

medium

Description

SiYuan versions through 3.8.4 fail to enforce publish access control in the getDynamicIcon endpoint, allowing read-only token holders to access document metadata. Attackers can call the endpoint with type=8 and crafted content to read block titles, names, aliases, and hierarchical paths of restricted documents via template injection.

References

https://www.vulncheck.com/advisories/siyuan-through-3.8.4-access-control-bypass-via-dynamic-icon-endpoint

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-whcx-xxqh-c838

https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/template.go#L485-L526

https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/router.go#L51

https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/icon.go#L546-L549

https://github.com/siyuan-note/siyuan

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83457

Details

Source: Mitre, NVD

Published: 2026-09-19

Updated: 2026-09-21

Risk Information

CVSS v2

Base Score: 4

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 4.3

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Severity: Medium

CVSS v4

Base Score: 5.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00378