CVE-2026-74868

HIGH 7.5

SiYuan before 3.7.4 Brute-Force Authentication via Publish Service

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

SiYuan versions before 3.7.4 contain an unthrottled brute-force vulnerability in the Publish Service Basic Auth implementation (PublishServiceTransport.RoundTrip() in kernel/server/proxy/publish.go). The Publish Service runs on a separate, unauthenticated-by-default listener (default TCP port 6808) and gates named publish-viewer accounts (Conf.Publish.Auth.Accounts) with Basic Auth that has no rate limiting, per-account lockout, or backoff. Unauthenticated remote attackers can submit unlimited password guesses against named accounts to gain access to published notes/notebooks.

CWE	CWE-307
Vendor	siyuan-note
Product	siyuan
Published	Aug 17, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

siyuan-note / siyuan

0 < 3.7.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phg7-xcr4-q5wg vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-brute-force-authentication-via-publish-service

Credits

🔍 alham-rizvi 🔍 l1nuxkid