{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8389 exists.","fix":"No fix has been published for CVE-2026-8389 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-8389 is a high-severity memory corruption vulnerability in Mozilla Firefox, published on 12 May 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-2026-8389 and fix it if it is affected.\n\nWhat it is: CVE-2026-8389 is a high-severity memory corruption vulnerability in Mozilla Firefox, published on 12 May 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8389 exists.\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-2026-8389/ (Markdown: https://insights.sbomify.com/CVE-2026-8389/index.md)","id":"CVE-2026-8389","markdown":"https://insights.sbomify.com/CVE-2026-8389/index.md","name":"CVE-2026-8389","record":{"aliases":["GHSA-qh6r-h4hf-pr8w","UBUNTU-CVE-2026-8389"],"analysis":{"component_type":"browser","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Firefox browser","requires_auth":"none","summary":"A JIT miscompilation flaw in Firefox allows attackers to execute arbitrary code or cause a denial of service.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mozilla","cpe":[{"product":"firefox","vendor":"mozilla"}],"cvss":{"score":8.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-733","name":"Compiler Optimization Removal or Modification of Security-critical Code"},{"id":"CWE-843","name":"Access of Resource Using Incompatible Type"},{"id":"CWE-686","name":"Function Call With Incorrect Argument Type"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-06-04","github_poc":1,"max_poc_stars":40,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-06-04T15:25:26Z","kind":"github_poc","ref":"https://github.com/crixpwn/CVE-2026-8389","stars":40,"title":null}],"tier":"weaponised"},"has_fix":false,"headline":"JIT miscompilation in the JavaScript Engine: JIT component","id":"CVE-2026-8389","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"mozilla:firefox","products":["mozilla:firefox"],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Use-after-free in the JavaScript: WebAssembly component","id":"CVE-2026-8390"},"packages":[],"prev":{"headline":"Incorrect boundary conditions in the JavaScript Engine: JIT component","id":"CVE-2026-8388"},"products":["Firefox"],"published":"2026-05-12","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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["Mozilla"]},"summary":"A JIT miscompilation flaw in Firefox allows attackers to execute arbitrary code or cause a denial of service.","url":"https://insights.sbomify.com/CVE-2026-8389/"}