{"id":"CVE-2026-85581","title":"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","summary":"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…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"siyuan-note","product":"siyuan","affected":["siyuan < 3.8.2"],"published":"2026-09-04","updated":"2026-09-10","sourceUpdated":"2026-09-10T16:17:59.087","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85581","references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wv96-wmf5-xvj2","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.2-denial-of-service-via-unauthenticated-ui-process-registration","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-10T14:23:07.702339Z"},"epss":0.00318,"epssPercentile":0.24846,"ingestedAt":"2026-09-08T20:10:03.164Z","slug":"CVE-2026-85581","body":"## Overview\n\nSiYuan 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}