{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100638 exists.","fix":"No fix has been published for CVE-2026-100638 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-100638 is a high-severity path traversal vulnerability in siyuan-note siyuan, published on 26 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-100638 and fix it if it is affected.\n\nWhat it is: CVE-2026-100638 is a high-severity path traversal vulnerability in siyuan-note siyuan, published on 26 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100638 exists.\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-2026-100638/ (Markdown: https://insights.sbomify.com/CVE-2026-100638/index.md)","id":"CVE-2026-100638","markdown":"https://insights.sbomify.com/CVE-2026-100638/index.md","name":"CVE-2026-100638","record":{"aliases":["GHSA-6gvc-7gr4-55rh","GHSA-6h8x-6mph-7438"],"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 files outside the workspace, potentially leading to arbitrary file creation or code execution.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L","version":"4.0"},"cwes":[{"id":"CWE-73","name":"External Control of File Name or Path"}],"description":"SiYuan versions before v3.8.4 contain a path traversal vulnerability in the setNotebookIcon endpoint that allows authenticated administrators to create arbitrary directory trees and write files outside the workspace boundary. Attackers can supply directory traversal sequences in the notebook parameter to escape the workspace data directory and write conf.json files to arbitrary locations accessible by the kernel process.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"SiYuan before v3.8.4 Path Traversal via setNotebookIcon","id":"CVE-2026-100638","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":"SiYuan before v3.8.4 Cross-Site Scripting via Kramdown IAL","id":"CVE-2026-100639"},"packages":[],"prev":{"headline":"SiYuan before v3.8.4 Path Traversal via checkoutRepo sessionID","id":"CVE-2026-100637"},"products":["siyuan"],"published":"2026-09-26","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-30","vendors":["siyuan-note"]},"summary":"Authenticated administrators can exploit path traversal in SiYuan to write files outside the workspace, potentially leading to arbitrary file creation or code execution.","url":"https://insights.sbomify.com/CVE-2026-100638/"}