Vulnerability · Published Aug 12, 2026 · Assigned by VulnCheck

CVE-2026-72801SiYuan before v3.7.4 Information Disclosure via Encryption Key Material

High 7.5

In plain English

A high-severity security flaw in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 76.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260724102025-3bc014c7dc32	GHSA-8x84-r2ff-h8pq
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260724102025-3bc014c7dc32	GO-2026-6392

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.7.4

Weakness: CWE-522 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-8x84-r2ff-h8pq) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.4 Information Disclosure via Encryption Key Material third-party-advisory