{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-77086 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-77086 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-77086 is a critical path traversal vulnerability in siyuan-note siyuan, published on 21 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-77086 and fix it if it is affected.\n\nWhat it is: CVE-2026-77086 is a critical path traversal vulnerability in siyuan-note siyuan, published on 21 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-77086 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-2026-77086/ (Markdown: https://insights.sbomify.com/CVE-2026-77086/index.md)","id":"CVE-2026-77086","markdown":"https://insights.sbomify.com/CVE-2026-77086/index.md","name":"CVE-2026-77086","record":{"aliases":["GHSA-w7g2-952j-gmgr"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_modify","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"SiYuan note-taking app","requires_auth":"high_privilege","summary":"Authenticated administrators can exploit path traversal in SiYuan to write arbitrary files or delete directories, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.4,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"SiYuan before v3.7.4 fails to validate the packageName parameter in Bazaar install and uninstall endpoints, allowing authenticated administrators to perform path traversal via directory traversal sequences. Attackers with admin access can write arbitrary files to any location via install operations or recursively delete directories via uninstall operations by supplying crafted packageName values.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"SiYuan before v3.7.4 Path Traversal via packageName","id":"CVE-2026-77086","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Paperclip before 0.3.1 Remote Code Execution via DNS Rebinding","id":"CVE-2026-77087"},"packages":[],"prev":{"headline":"n8n before 2.34.1 SSRF Protection Bypass via SearXNG Tool","id":"CVE-2026-77085"},"products":["siyuan"],"published":"2026-08-21","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["siyuan-note"]},"summary":"Authenticated administrators can exploit path traversal in SiYuan to write arbitrary files or delete directories, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2026-77086/"}