Vulnerability · Published Aug 17, 2026 · Assigned by VulnCheck
CVE-2026-74799SiYuan before 3.7.4 Unauthenticated Debug Endpoint Information Disclosure
Critical 9.3
In plain English
A critical-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 0.5% (higher than 46% of all known vulnerabilities).
Severity (CVSS 3.1)9.3Critical
Exploit odds (30 days)0.5%top 54.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
SiYuan before 3.7.4 registers Go net/http/pprof debug endpoints including heap and goroutine dumps without authentication when --mode flag is not set to exactly prod. Attackers can access /debug/pprof/heap and related endpoints to extract in-memory secrets including AccessAuthCode and AI provider API keys.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| siyuan-note | siyuan | 0 – before 3.7.4 |
Weakness: CWE-215 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
References
- GitHub Security Advisory (GHSA-9cqq-p2hw-mj3f) vendor-advisory
- VulnCheck Advisory: SiYuan before 3.7.4 Unauthenticated Debug Endpoint Information Disclosure third-party-advisory