{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-124853 in the wild and no public exploit code.","exposure":"","fix":"Upgrade to a fixed version.","what":"CVE-2026-124853 is a critical vulnerability in Mozilla Firefox, published on 10 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-124853 and fix it if it is affected.\n\nWhat it is: CVE-2026-124853 is a critical vulnerability in Mozilla Firefox, published on 10 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-124853 in the wild and no public exploit code.\n\nAffected product: Mozilla Firefox. 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-2026-124853/ (Markdown: https://insights.sbomify.com/CVE-2026-124853/index.md)","id":"CVE-2026-124853","markdown":"https://insights.sbomify.com/CVE-2026-124853/index.md","name":"CVE-2026-124853","record":{"aliases":["DEBIAN-CVE-2026-124853","GHSA-f7px-m4vf-5qg5","UBUNTU-CVE-2026-124853"],"analysis":null,"analysis_generated_by":null,"assigner":"mozilla","cpe":[],"cvss":{"score":9.6,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"Sandbox escape due to incorrect boundary conditions in the Graphics: Text component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.","ecosystems":[],"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":"Sandbox escape due to incorrect boundary conditions in the Graphics: Text component","id":"CVE-2026-124853","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"Privilege escalation in the DOM: Navigation component","id":"CVE-2026-124854"},"nickname":null,"packages":[],"prev":{"headline":"Incorrect boundary conditions in the Graphics: CanvasWebGL component","id":"CVE-2026-124852"},"products":["Firefox","Thunderbird"],"published":"2026-11-10","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":"2026-11-12","vendors":["Mozilla"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-124853/"}