{"answers":{"affected":"3 open source packages ship an affected version, including github.com/siyuan-note/siyuan/kernel.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-74904 exists.","fix":"Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260804015139-bd067a4fe9b2 or later.","what":"CVE-2026-74904 is a high-severity missing authorization vulnerability in siyuan-note siyuan, published on 18 Aug 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-2026-74904 and fix it if it is affected.\n\nWhat it is: CVE-2026-74904 is a high-severity missing authorization vulnerability in siyuan-note siyuan, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-74904 exists.\n\nAffected packages and fixed versions:\n- github.com/siyuan-note/siyuan/kernel (Go): affected all versions; fixed in 0.0.0-20260804015139-bd067a4fe9b2\n- github.com/siyuan-note/siyuan/kernel (Go): affected all versions; fixed in 0.0.0-20260804015139-bd067a4fe9b2\n- github.com/siyuan-note/siyuan/kernel (Go): affected all versions; fixed in 0.0.0-20260804015139-bd067a4fe9b2\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-2026-74904/ (Markdown: https://insights.sbomify.com/CVE-2026-74904/index.md)","id":"CVE-2026-74904","markdown":"https://insights.sbomify.com/CVE-2026-74904/index.md","name":"CVE-2026-74904","record":{"aliases":["GHSA-4vpg-gwqq-w44c","GO-2026-6654"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"SiYuan note-taking app","requires_auth":"none","summary":"Attackers can read private block content and metadata in SiYuan when publish mode is enabled due to missing authorization checks.","user_interaction":"not_required","vuln_class":"missing_authorization"},"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:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"description":"SiYuan before v3.7.4 is missing authorization checks in 17 block metadata/content endpoints in kernel/api/block.go (including getRefText, checkBlockExist, and getBlockBreadcrumb). These handlers are gated only by basic authentication (model.CheckAuth) and lack publish-access filtering, allowing anonymous publish-mode readers to disclose private block content-derived text, structural metadata, and existence information for arbitrary block IDs across the workspace.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"SiYuan before v3.7.4 Missing Authorization via block API","id":"CVE-2026-74904","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"SiYuan before v3.7.4 SSRF via IPv6 Transition Address Bypass","id":"CVE-2026-74905"},"packages":[{"ecosystem":"Go","fixed":["0.0.0-20260804015139-bd067a4fe9b2"],"introduced":["0"],"last_affected":[],"package":"github.com/siyuan-note/siyuan/kernel","purl":null,"source":"GHSA-4vpg-gwqq-w44c"},{"ecosystem":"Go","fixed":["0.0.0-20260804015139-bd067a4fe9b2"],"introduced":["0"],"last_affected":[],"package":"github.com/siyuan-note/siyuan/kernel","purl":"pkg:golang/github.com/siyuan-note/siyuan/kernel","source":"GHSA-4vpg-gwqq-w44c"},{"ecosystem":"Go","fixed":["0.0.0-20260804015139-bd067a4fe9b2"],"introduced":["0"],"last_affected":[],"package":"github.com/siyuan-note/siyuan/kernel","purl":"pkg:golang/github.com/siyuan-note/siyuan/kernel","source":"GO-2026-6654"}],"prev":{"headline":"SiYuan before v3.7.4 Insufficient Access Control via spinBlockDOM","id":"CVE-2026-74903"},"products":["siyuan"],"published":"2026-08-18","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-18","vendors":["siyuan-note"]},"summary":"Attackers can read private block content and metadata in SiYuan when publish mode is enabled due to missing authorization checks.","url":"https://insights.sbomify.com/CVE-2026-74904/"}