Vulnerability DatabaseCVE-2026-85581
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CVE-2026-85581
Published:September 04, 2026
Updated:September 22, 2026
SiYuan before v3.8.2 contains a denial of service vulnerability in the unauthenticated /api/system/uiproc endpoint that accepts and retains attacker-controlled process identifiers without size limits or authentication. Attackers can send repeated requests with unique identifiers to exhaust process memory and degrade service availability.
Affected Packages
github.com/siyuan-note/siyuan (GO):
Affected version(s) >=v0.1.0 <v3.8.2
Fix Suggestion:
Update to version v3.8.2
Related Resources (4)
https://www.vulncheck.com/advisories/siyuan-before-3.8.2-denial-of-service-via-unauthenticated-ui-process-registration
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wv96-wmf5-xvj2
https://nvd.nist.gov/vuln/detail/CVE-2026-85581
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85581.json
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Allocation of Resources Without Limits or Throttling
CWE-770
EPSS
Base Score:
0.32