CVE-2026-85584
SiYuan before v3.8.2 Denial of Service via Auth Throttle
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
SiYuan versions before v3.8.2 contain a denial of service vulnerability in the publish-service Basic Auth throttle that stores failed-attempt state using attacker-controlled usernames without enforcing capacity limits or eviction policies. Unauthenticated attackers can submit repeated authentication requests with unique invalid usernames to exhaust memory and increase synchronization overhead, degrading service availability.
| CWE | CWE-770 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Sep 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
siyuan-note / siyuan
0 < 3.8.2