Vulnerability in Siyuan-Note Siyuan
CVE-2026-74799
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.002
Affected products
- Siyuan-Note Siyuan — versions 0, 3.7.4
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-9cqq-p2hw-mj3f (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-before-unauthenticated-debug-endpoint-infor… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-74799?
- CVE-2026-74799 is a critical-severity vulnerability in Siyuan-Note Siyuan, classified under Insertion of Sensitive Information Into Debugging Code. CVSS score: 9.3/10. Published 2026-08-17.
- How severe is CVE-2026-74799?
- Critical severity. CVSS v3 base score is 9.3 out of 10.