CVE-2026-101091

high

Description

SiYuan versions before v3.8.4 fail to properly validate SQL statements in block query embed blocks executed against siyuan.db. Attackers can craft malicious .sy documents with non-read-only SQL statements that execute automatically during background indexing, rendering, or export operations without authentication.

References

https://www.vulncheck.com/advisories/siyuan-before-3.8.4-sql-injection-via-block-query-embed

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-67p9-hm94-xwf3

https://github.com/siyuan-note/siyuan/commit/e8ace0c89182c7ee1a1298ff2a849bb6a83dfdec

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-88559

Details

Source: Mitre, NVD

Published: 2026-09-28

Updated: 2026-09-29

Risk Information

CVSS v2

Base Score: 8.5

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

Severity: High

CVSS v3

Base Score: 7.1

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

Severity: High

CVSS v4

Base Score: 7.1

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

Severity: High

EPSS

EPSS: 0.00315