CVE-2026-85582

7.1 highEPSS 0.4%

SiYuan versions before v3.8.2 contain an unbounded session creation vulnerability in the publish-service Basic Auth handler that allows authenticated attackers to exhaust memory. Attackers can repeatedly authenticate with valid credentials to create persistent session entries without expiry or capacity limits, causing indefinite process memory growth and denial of service.

Severity

CVSS 4.0

7.1 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-31)
CWE: CWE-770
Published: 2026-09-04
Modified: 2026-09-08
Record from: the NVD, synced 2026-10-19

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f4vj-ppp2-5hg4
https://www.vulncheck.com/advisories/siyuan-before-3.8.2-unbounded-session-creation-via-basic-auth
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f4vj-ppp2-5hg4

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