Critical severity · published Aug 17, 2026
CVE-2026-74799
SiYuan before 3.7.4 Unauthenticated Debug Endpoint Information Disclosure
9.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
siyuan · siyuan-note
before 3.7.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74799
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-74799
github.com
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-9cqq-p2hw-mj3f
www.vulncheck.com
https://www.vulncheck.com/advisories/siyuan-before-unauthenticated-debug-endpoint-information-disclosure
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