CVE-2026-72803

SiYuan before v3.7.4 Information Disclosure via getBlockAttrs

SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents by sending POST requests with block IDs.

Affected

siyuan-note · siyuan

CVSS v4.0 VULNCHECK

6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

5.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS

0.33% chance of exploitation in the next 30 days, 24th percentile

Published

2026-08-12

Updated

2026-08-14

Proof-of-concept exploits (1)

• advisories/GHSA-qvq9-hq6p-v378

References

• CVE Record
• NVD entry