TI-2026-51027 Aliases CVE-2026-72801 GHSA-8x84-r2ff-h8pq

SiYuan before v3.7.4 Information Disclosure via Encryption Key Material

HIGH 77CWE-522Published 2026-08-12 · Updated 2026-08-14

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-522.

Summary

SiYuan versions before v3.7.4 disclose encrypted-notebook key-derivation material and wrapped data keys through unauthenticated endpoints in publish mode. Attackers can retrieve Argon2id salt, cost parameters, password verifiers, and wrapped notebook keys to perform unlimited offline master-password cracking without rate limiting.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00305 23rd percentileScored 2026-11-07

Fix Fixed siyuan (siyuan-note): 3.7.4github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260724102025-3bc014c7dc32

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
siyuan-note	siyuan	before 3.7.4	3.7.4	Patch available	CNA
—	github.com/siyuan-note/siyuan/kernel (Go)	before 0.0.0-20260724102025-3bc014c7dc32	0.0.0-20260724102025-3bc014c7dc32	Patch available	GHSA-8x84-r2ff-h8pq

siyuan Vendorsiyuan-note Affected before 3.7.4 Fixed in 3.7.4 Patch available CNA
github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 0.0.0-20260724102025-3bc014c7dc32 Fixed in 0.0.0-20260724102025-3bc014c7dc32 Patch available GHSA-8x84-r2ff-h8pq

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:b3log:siyuan::::::::	—	—	siyuan-note

cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* Versions — — ·siyuan-note

Remediation

Fix · CNA siyuan (siyuan-note) Fixed in 3.7.4
Fix · GHSA-8x84-r2ff-h8pq github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260724102025-3bc014c7dc32 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-08-12
siyuan-note siyuan 3.7.4
21 records Highest priority Priority HIGH 12 HIGH, 4 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2026-51021 SiYuan before v3.7.4 Information Disclosure via Embed BlockPriority HIGH 79
- TI-2026-51020 siyuan before v3.7.4 Session Cookie Key Disclosure via getConfPriority HIGH 79
- TI-2026-51019 SiYuan before v3.7.4 Information Disclosure via /api/system/getConfPriority HIGH 79
Show all 21 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-72801
2026-10-03 Alias added: GHSA-8x84-r2ff-h8pq

References

Advisory 2

Other 1

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

TI-2026-48492 SiYuan before v3.7.3 SQL Injection via searchDocs CVSS 4.0CRITICAL 9.9
TI-2026-48491 SiYuan before v3.7.3 SQL Injection via searchEmbedBlock CVSS 4.0CRITICAL 9.9
TI-2026-48490 SiYuan before v3.7.3 SQL Injection via fullTextSearchAssetContent CVSS 4.0CRITICAL 9.9
TI-2026-47010 SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP CVSS 4.0CRITICAL 10.0
TI-2026-26050 SiYuan has directory traversal within its publishing service CVSS 3.1CRITICAL 9.8
TI-2026-25256 SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API CVSS 3.1CRITICAL 9.8

See all 242 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences