{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40322 exists.","fix":"No fix has been published for CVE-2026-40322 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-40322 is a critical cross-site scripting vulnerability in B3log Siyuan, published on 16 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-40322 and fix it if it is affected.\n\nWhat it is: CVE-2026-40322 is a critical cross-site scripting vulnerability in B3log Siyuan, published on 16 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40322 exists.\n\nAffected product: B3log 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-2026-40322/ (Markdown: https://insights.sbomify.com/CVE-2026-40322/index.md)","id":"CVE-2026-40322","markdown":"https://insights.sbomify.com/CVE-2026-40322/index.md","name":"CVE-2026-40322","record":{"aliases":["GHSA-x63q-3rcj-hhp5"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["code_execution","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"SiYuan knowledge management","requires_auth":"low_privilege","summary":"Attackers can inject JavaScript via Mermaid diagrams to achieve stored XSS and remote code execution in the Electron desktop app.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"siyuan","vendor":"b3log"}],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"},{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to \"loose\", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to survive into the rendered output. On desktop builds using Electron, windows are created with nodeIntegration enabled and contextIsolation disabled, escalating the stored XSS to arbitrary code execution when a victim opens a note containing a malicious Mermaid block and clicks the rendered diagram node. This issue has been fixed in version 3.6.4.","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: Mermaid `javascript:` Link Injection Leads to Stored XSS and Electron RCE","id":"CVE-2026-40322","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"b3log:siyuan","products":["b3log:siyuan"],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"SP1 V6 Recursion Circuit Row-Count Binding Gap","id":"CVE-2026-40323"},"packages":[],"prev":{"headline":"DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload","id":"CVE-2026-40321"},"products":["siyuan"],"published":"2026-04-16","related":[{"cvss_score":9.9,"headline":"SiYuan has an Arbitrary File Read in its Desktop Publish Service","id":"CVE-2026-32938","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":9.8,"headline":"SiYuan has Arbitrary Document Reading within the Publishing Service","id":"CVE-2026-33669","kev_date_added":null,"published":"2026-03-26"},{"cvss_score":9.8,"headline":"SiYuan has directory traversal within its publishing service","id":"CVE-2026-33670","kev_date_added":null,"published":"2026-03-26"},{"cvss_score":9.8,"headline":"SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API","id":"CVE-2026-32767","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":9.8,"headline":"SQL injection in n/a","id":"CVE-2024-53504","kev_date_added":null,"published":"2024-11-29"},{"cvss_score":9.8,"headline":"SQL injection in n/a","id":"CVE-2024-53505","kev_date_added":null,"published":"2024-11-29"},{"cvss_score":9.8,"headline":"SQL injection in n/a","id":"CVE-2024-53506","kev_date_added":null,"published":"2024-11-29"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"total"},"state":"PUBLISHED","updated":"2026-04-17","vendors":["siyuan-note"]},"summary":"Attackers can inject JavaScript via Mermaid diagrams to achieve stored XSS and remote code execution in the Electron desktop app.","url":"https://insights.sbomify.com/CVE-2026-40322/"}