{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-74902 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-74902 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-74902 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 18 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-74902 and fix it if it is affected.\n\nWhat it is: CVE-2026-74902 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 18 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-74902 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-2026-74902/ (Markdown: https://insights.sbomify.com/CVE-2026-74902/index.md)","id":"CVE-2026-74902","markdown":"https://insights.sbomify.com/CVE-2026-74902/index.md","name":"CVE-2026-74902","record":{"aliases":["GHSA-jwj6-pgg9-m3v5"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"SiYuan note-taking app","requires_auth":"none","summary":"Attackers can execute arbitrary OS commands by tricking users into uploading files with malicious filenames containing script payloads.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"SiYuan before v3.7.4 contains a cross-site scripting vulnerability in the file upload validation flow that fails to escape filenames before inserting them into HTML via insertAdjacentHTML. Attackers can craft a malicious filename containing script payloads that execute with full OS command access when a user drags, drops, or pastes the file into the editor.","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 XSS-to-RCE via malicious filename upload","id":"CVE-2026-74902","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"SiYuan before v3.7.4 Insufficient Access Control via spinBlockDOM","id":"CVE-2026-74903"},"packages":[],"prev":{"headline":"openssl_encrypt before 1.4.0 Authentication Bypass via AES-CTR Fallback","id":"CVE-2026-74901"},"products":["siyuan"],"published":"2026-08-18","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":"2026-10-08","vendors":["siyuan-note"]},"summary":"Attackers can execute arbitrary OS commands by tricking users into uploading files with malicious filenames containing script payloads.","url":"https://insights.sbomify.com/CVE-2026-74902/"}