{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-91018 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-91018 is a high-severity use after free vulnerability in lwIP API, published on 22 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-91018 and fix it if it is affected.\n\nWhat it is: CVE-2026-91018 is a high-severity use after free vulnerability in lwIP API, published on 22 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-91018 in the wild and no public exploit code.\n\nAffected product: lwIP API. 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-2026-91018/ (Markdown: https://insights.sbomify.com/CVE-2026-91018/index.md)","id":"CVE-2026-91018","markdown":"https://insights.sbomify.com/CVE-2026-91018/index.md","name":"CVE-2026-91018","record":{"aliases":["DEBIAN-CVE-2026-91018","GHSA-rmx4-24pf-8x6h","UBUNTU-CVE-2026-91018"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"lwIP network stack","requires_auth":"none","summary":"A double free vulnerability in the lwIP library allows attackers to cause denial of service or execute arbitrary code on affected systems.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-415","name":"Double Free"}],"description":"lwIP (Lightweight IP) has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system.","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":"Double Free in lwIP (lightweight IP)","id":"CVE-2026-91018","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Event Booking Manager for WooCommerce \u003c 5.6.0 - Contributor+ Payment Gateway Credential Disclosure","id":"CVE-2026-91019"},"packages":[],"prev":{"headline":"Robokassa payment gateway for Woocommerce \u003c 1.8.9 - Unauthenticated Payment Bypass via Forged JWT Callback","id":"CVE-2026-91017"},"products":["lwIP API"],"published":"2026-09-22","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":"2026-09-23","vendors":["lwIP"]},"summary":"A double free vulnerability in the lwIP library allows attackers to cause denial of service or execute arbitrary code on affected systems.","url":"https://insights.sbomify.com/CVE-2026-91018/"}