{"answers":{"affected":"8 open source packages ship an affected version, including @ckeditor/ckeditor5-engine and ckeditor5.","exploited":"There is no known exploitation of CVE-2026-116688 in the wild and no public exploit code.","fix":"Upgrade @ckeditor/ckeditor5-engine to a fixed version for your release line: 47.7.4 or 48.5.1.","what":"CVE-2026-116688 is a high-severity vulnerability in ckeditor5, published on 27 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-116688 and fix it if it is affected.\n\nWhat it is: CVE-2026-116688 is a high-severity vulnerability in ckeditor5, published on 27 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-116688 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @ckeditor/ckeditor5-engine (npm): affected from 45.0.0; fixed in 47.7.4\n- @ckeditor/ckeditor5-engine (npm): affected from 45.0.0; fixed in 47.7.4\n- @ckeditor/ckeditor5-engine (npm): affected from 48.0.0; fixed in 48.5.1\n- @ckeditor/ckeditor5-engine (npm): affected from 48.0.0; fixed in 48.5.1\n- ckeditor5 (npm): affected from 45.0.0; fixed in 47.7.4\n- ckeditor5 (npm): affected from 45.0.0; fixed in 47.7.4\n- ckeditor5 (npm): affected from 48.0.0; fixed in 48.5.1\n- ckeditor5 (npm): affected from 48.0.0; fixed in 48.5.1\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-2026-116688/ (Markdown: https://insights.sbomify.com/CVE-2026-116688/index.md)","id":"CVE-2026-116688","markdown":"https://insights.sbomify.com/CVE-2026-116688/index.md","name":"CVE-2026-116688","record":{"aliases":["GHSA-rh54-vffm-5fvp","UBUNTU-CVE-2026-116688"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. From 45.0.0 until 47.7.4 and 48.5.1, the engine uses a vulnerable es-toolkit version whose prototype-pollution behavior can be reached while CKEditor processes incoming style attribute values. Crafted editor content can thereby cause unauthorized JavaScript execution in the browser. This issue is fixed in versions 47.7.4 and 48.5.1.","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":"CKEditor: Cross-site scripting (XSS) in the engine package","id":"CVE-2026-116688","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":8,"n_references":5,"next":{"headline":"follow-redirects: Cross-realm sensitiveHeaders arrays are discarded and custom credentials can follow redirects","id":"CVE-2026-116689"},"packages":[{"ecosystem":"npm","fixed":["47.7.4"],"introduced":["45.0.0"],"last_affected":[],"package":"@ckeditor/ckeditor5-engine","purl":null,"source":"GHSA-rh54-vffm-5fvp"},{"ecosystem":"npm","fixed":["47.7.4"],"introduced":["45.0.0"],"last_affected":[],"package":"@ckeditor/ckeditor5-engine","purl":"pkg:npm/%40ckeditor/ckeditor5-engine","source":"GHSA-rh54-vffm-5fvp"},{"ecosystem":"npm","fixed":["48.5.1"],"introduced":["48.0.0"],"last_affected":[],"package":"@ckeditor/ckeditor5-engine","purl":null,"source":"GHSA-rh54-vffm-5fvp"},{"ecosystem":"npm","fixed":["48.5.1"],"introduced":["48.0.0"],"last_affected":[],"package":"@ckeditor/ckeditor5-engine","purl":"pkg:npm/%40ckeditor/ckeditor5-engine","source":"GHSA-rh54-vffm-5fvp"},{"ecosystem":"npm","fixed":["47.7.4"],"introduced":["45.0.0"],"last_affected":[],"package":"ckeditor5","purl":null,"source":"GHSA-rh54-vffm-5fvp"},{"ecosystem":"npm","fixed":["47.7.4"],"introduced":["45.0.0"],"last_affected":[],"package":"ckeditor5","purl":"pkg:npm/ckeditor5","source":"GHSA-rh54-vffm-5fvp"},{"ecosystem":"npm","fixed":["48.5.1"],"introduced":["48.0.0"],"last_affected":[],"package":"ckeditor5","purl":null,"source":"GHSA-rh54-vffm-5fvp"},{"ecosystem":"npm","fixed":["48.5.1"],"introduced":["48.0.0"],"last_affected":[],"package":"ckeditor5","purl":"pkg:npm/ckeditor5","source":"GHSA-rh54-vffm-5fvp"}],"prev":{"headline":"CKEditor: Cross-site scripting (XSS) in the engine package","id":"CVE-2026-116687"},"products":["ckeditor5"],"published":"2026-10-27","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-27","vendors":["ckeditor"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-116688/"}