High severity · published Aug 12, 2026
CVE-2026-72793
SiYuan before v3.7.4 Information Disclosure via /api/system/getConf
8.6
CVSS
0.3%
EPSS
No
On KEV
Description
SiYuan versions before v3.7.4 fail to mask sensitive configuration fields in the /api/system/getConf endpoint, allowing anonymous or publish-reader users to obtain the session-cookie signing key, OS username via pandoc path, and encrypted-notebook key material. Attackers can forge and tamper with session cookies to impersonate users, and on instances without access-auth codes configured, escalate to administrator privileges.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% 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-2026-72793
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72793
github.com
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-h4v5-crx2-3cv4
www.vulncheck.com
https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-api-system-getconf
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