{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-85581 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-85581 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-85581 is a high-severity denial of service vulnerability in siyuan-note siyuan, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-85581 and fix it if it is affected.\n\nWhat it is: CVE-2026-85581 is a high-severity denial of service vulnerability in siyuan-note siyuan, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-85581 in the wild and no public exploit code.\n\nAffected product: siyuan-note siyuan. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-85581/ (Markdown: https://insights.sbomify.com/CVE-2026-85581/index.md)","id":"CVE-2026-85581","markdown":"https://insights.sbomify.com/CVE-2026-85581/index.md","name":"CVE-2026-85581","record":{"aliases":["GHSA-4qv4-f447-c9m2","GHSA-wv96-wmf5-xvj2"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"SiYuan note-taking app","requires_auth":"none","summary":"Unauthenticated attackers can exhaust process memory by sending repeated requests to the UI-process registration endpoint, causing service degradation.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"SiYuan before v3.8.2 Denial of Service via unauthenticated UI-process registration","id":"CVE-2026-85581","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"SiYuan before v3.8.2 Unbounded Session Creation via Basic Auth","id":"CVE-2026-85582"},"packages":[],"prev":{"headline":"SiYuan before v3.8.2 Path Guard Bypass via Case Mismatch","id":"CVE-2026-85580"},"products":["siyuan"],"published":"2026-09-04","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-10","vendors":["siyuan-note"]},"summary":"Unauthenticated attackers can exhaust process memory by sending repeated requests to the UI-process registration endpoint, causing service degradation.","url":"https://insights.sbomify.com/CVE-2026-85581/"}