{"answers":{"affected":"2 open source packages ship an affected version, including prosemirror-view.","exploited":"There is no known exploitation of CVE-2026-104847 in the wild and no public exploit code.","fix":"Upgrade prosemirror-view to 1.42.3 or later.","what":"CVE-2026-104847 is a high-severity cross-site scripting vulnerability in prosemirror-view, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-104847 and fix it if it is affected.\n\nWhat it is: CVE-2026-104847 is a high-severity cross-site scripting vulnerability in prosemirror-view, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-104847 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- prosemirror-view (npm): affected all versions; fixed in 1.42.3\n- prosemirror-view (npm): affected all versions; fixed in 1.42.3\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-2026-104847/ (Markdown: https://insights.sbomify.com/CVE-2026-104847/index.md)","id":"CVE-2026-104847","markdown":"https://insights.sbomify.com/CVE-2026-104847/index.md","name":"CVE-2026-104847","record":{"aliases":["ECHO-6adb-f707-8d52","GHSA-c8x8-7fp4-3x9w","MINI-2x3r-qwf7-m9mx","ROOT-APP-NPM-CVE-2026-104847"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript rich text editor","requires_auth":"none","summary":"Attackers can execute arbitrary JavaScript in a user's browser by crafting HTML with unvalidated attributes that bypass schema validation during paste operations in ProseMirror editors.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.5,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"ProseMirror's view component renders and manages the editable browser interface for ProseMirror documents. Prior to 1.42.3, prosemirror-view paste handling accepts attacker-provided HTML whose clipboard slice context contains attributes that are not passed through schema attribute validation. When a user pastes the crafted HTML into an editor, the unvalidated context attributes can construct content that executes attacker-controlled JavaScript in the browser window containing the editor. This issue is fixed in version 1.42.3.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ProseMirror: XSS vulnerability in prosemirror-view's paste handling","id":"CVE-2026-104847","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution","id":"CVE-2026-104848"},"packages":[{"ecosystem":"npm","fixed":["1.42.3"],"introduced":["0"],"last_affected":[],"package":"prosemirror-view","purl":null,"source":"GHSA-c8x8-7fp4-3x9w"},{"ecosystem":"npm","fixed":["1.42.3"],"introduced":["0"],"last_affected":[],"package":"prosemirror-view","purl":"pkg:npm/prosemirror-view","source":"GHSA-c8x8-7fp4-3x9w"}],"prev":{"headline":"Seroval: `fromJSON()` Promise thenable assimilation invokes plugin-produced callables (bypass of CVE-2026-59940)","id":"CVE-2026-104846"},"products":["prosemirror-view"],"published":"2026-10-02","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":"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":"2026-10-02","vendors":["ProseMirror"]},"summary":"Attackers can execute arbitrary JavaScript in a user's browser by crafting HTML with unvalidated attributes that bypass schema validation during paste operations in ProseMirror editors.","url":"https://insights.sbomify.com/CVE-2026-104847/"}