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.

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.

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.

Affected products

Siyuan-note Siyuan — versions 0, 3.7.4

Weakness classification (CWE)

CWE-215 — Insertion of Sensitive Information Into Debugging Code

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (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.