CVE-2026-85585 Details
Description
SiYuan before v3.8.2 contains an unbounded resource consumption vulnerability in the request-concurrency middleware that retains mutex entries for every unique request path without eviction. Unauthenticated attackers can send numerous unique request paths to permanently increase process memory and synchronization overhead, degrading availability.
A vulnerability allowing unbounded resource consumption has been identified in SiYuan versions prior to 3.8.2. This issue arises in the request-concurrency middleware, which retains mutex entries for every unique request path without any eviction mechanism. Unauthenticated attackers can exploit this by sending numerous unique request paths, leading to a permanent increase in process memory usage and synchronization overhead. This unbounded resource consumption degrades the application's availability.
Users are advised to update to SiYuan version 3.8.2 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 4, 2026CISA-ADP
Assessed Sep 4, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-p59v-3q54-qq55 | CISA-ADP | AdvisoryExploitVendor |
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-p59v-3q54-qq55 | [email protected] | AdvisoryExploitVendor |
| https://www.vulncheck.com/advisories/siyuan-before-3.8.2-unbounded-memory-consumption-via-controlconcurrency | [email protected] | AdvisoryVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| SiYuan | < 3.8.2 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 4, 2026 | CVE Modified | CISA-ADP |
| Sep 4, 2026 | New CVE Received | [email protected] |