{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-4687 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-4687 is a critical vulnerability in Mozilla Firefox, published on 24 Mar 2026."},"fix_prompt":"Check this codebase for CVE-2026-4687 and fix it if it is affected.\n\nWhat it is: CVE-2026-4687 is a critical vulnerability in Mozilla Firefox, published on 24 Mar 2026. \nExploitation: There is no known exploitation of CVE-2026-4687 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-2026-4687/ (Markdown: https://insights.sbomify.com/CVE-2026-4687/index.md)","id":"CVE-2026-4687","markdown":"https://insights.sbomify.com/CVE-2026-4687/index.md","name":"CVE-2026-4687","record":{"aliases":["DEBIAN-CVE-2026-4687","GHSA-gw7x-g9xx-wmm2","UBUNTU-CVE-2026-4687"],"analysis":null,"analysis_generated_by":null,"assigner":"mozilla","cpe":[{"product":"firefox","vendor":"mozilla"}],"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-754","name":"Improper Check for Unusual or Exceptional Conditions"},{"id":"CWE-501","name":"Trust Boundary Violation"},{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.","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 Telemetry component","id":"CVE-2026-4687","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"mozilla:firefox","products":["mozilla:firefox"],"type":null,"year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"Sandbox escape due to use-after-free in the Disability Access APIs component","id":"CVE-2026-4688"},"packages":[],"prev":{"headline":"Incorrect boundary conditions in the Graphics: Canvas2D component","id":"CVE-2026-4686"},"products":["Firefox","Thunderbird"],"published":"2026-03-24","related":[{"cvss_score":10,"headline":"Mozilla Firefox and Thunderbird Sandbox Escape","id":"CVE-2019-11708","kev_date_added":"2022-05-23","published":"2019-07-23"},{"cvss_score":9.8,"headline":"Mozilla Multiple Products Remote Code Execution","id":"CVE-2010-3765","kev_date_added":"2025-10-06","published":"2010-10-27"},{"cvss_score":9.6,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2022-26486","kev_date_added":"2022-03-07","published":"2022-12-22"},{"cvss_score":8.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2022-26485","kev_date_added":"2022-03-07","published":"2022-12-22"},{"cvss_score":8.8,"headline":"Mozilla Firefox and Thunderbird Type Confusion","id":"CVE-2019-11707","kev_date_added":"2022-05-23","published":"2019-07-23"},{"cvss_score":8.1,"headline":"Mozilla Firefox And Thunderbird Use-After-Free","id":"CVE-2020-6819","kev_date_added":"2021-11-03","published":"2020-04-24"},{"cvss_score":8.1,"headline":"Mozilla Firefox And Thunderbird Use-After-Free","id":"CVE-2020-6820","kev_date_added":"2021-11-03","published":"2020-04-24"}],"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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["Mozilla"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-4687/"}