{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-86853 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-86853 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-86853 is a medium-severity denial of service vulnerability in Mozilla Firefox Mobile, published on 8 Sep 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-2026-86853 and fix it if it is affected.\n\nWhat it is: CVE-2026-86853 is a medium-severity denial of service vulnerability in Mozilla Firefox Mobile, published on 8 Sep 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-2026-86853 in the wild and no public exploit code.\n\nAffected product: Mozilla Firefox Mobile. 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-2026-86853/ (Markdown: https://insights.sbomify.com/CVE-2026-86853/index.md)","id":"CVE-2026-86853","markdown":"https://insights.sbomify.com/CVE-2026-86853/index.md","name":"CVE-2026-86853","record":{"aliases":["GHSA-4c3m-8r8c-3rf3"],"analysis":{"component_type":"mobile_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Firefox for iOS","requires_auth":"none","summary":"A malicious webpage can cause a denial of service in Firefox for iOS by repeatedly triggering external URL schemes, requiring an upgrade to fix.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mozilla","cpe":[{"product":"firefox_mobile","vendor":"mozilla"}],"cvss":{"score":4.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-451","name":"User Interface (UI) Misrepresentation of Critical Information"}],"description":"A malicious webpage could repeatedly trigger external URL schemes, causing system prompts or external application launches. This could make Firefox for iOS temporarily unusable until the page is closed. This vulnerability was fixed in Firefox for iOS 155.1.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Repeated external URL scheme launches could potentially cause a denial of service in Firefox for iOS","id":"CVE-2026-86853","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"mozilla:firefox_mobile","products":["mozilla:firefox_mobile"],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Dpdk: dpdk: stack and heap buffer overflow in nfp vdpa driver","id":"CVE-2026-86856"},"packages":[],"prev":{"headline":"Livees Checkout 6.8 - 7.0.2 - Unauthenticated Order Status Change, Order Note Injection \u0026 Order Key Disclosure","id":"CVE-2026-86851"},"products":["Firefox for iOS"],"published":"2026-09-08","related":[{"cvss_score":9.8,"headline":"Other issue in Firefox Focus for Android","id":"CVE-2026-84135","kev_date_added":null,"published":"2026-09-01"},{"cvss_score":9.8,"headline":"Cross-site scripting in Firefox for iOS","id":"CVE-2024-43111","kev_date_added":null,"published":"2024-08-06"},{"cvss_score":9.8,"headline":"Information disclosure in Firefox for iOS","id":"CVE-2023-49060","kev_date_added":null,"published":"2023-11-21"},{"cvss_score":8.8,"headline":"Privilege escalation in Firefox for Android","id":"CVE-2026-92033","kev_date_added":null,"published":"2026-09-15"},{"cvss_score":8.8,"headline":"Privilege escalation in Firefox for Android","id":"CVE-2026-84117","kev_date_added":null,"published":"2026-09-01"},{"cvss_score":8.1,"headline":"Other in Firefox","id":"CVE-2021-29993","kev_date_added":null,"published":"2021-11-03"},{"cvss_score":7.5,"headline":"Information disclosure in the Privacy component in Firefox for Android","id":"CVE-2026-16373","kev_date_added":null,"published":"2026-07-21"}],"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":"partial"},"state":"PUBLISHED","updated":"2026-09-08","vendors":["Mozilla"]},"summary":"A malicious webpage can cause a denial of service in Firefox for iOS by repeatedly triggering external URL schemes, requiring an upgrade to fix.","url":"https://insights.sbomify.com/CVE-2026-86853/"}