{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-6040 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-6040 is a medium-severity use after free vulnerability in The Document Foundation LibreOffice, published on 15 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-6040 and fix it if it is affected.\n\nWhat it is: CVE-2026-6040 is a medium-severity use after free vulnerability in The Document Foundation LibreOffice, published on 15 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-6040 in the wild and no public exploit code.\n\nAffected product: The Document Foundation LibreOffice. 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-2026-6040/ (Markdown: https://insights.sbomify.com/CVE-2026-6040/index.md)","id":"CVE-2026-6040","markdown":"https://insights.sbomify.com/CVE-2026-6040/index.md","name":"CVE-2026-6040","record":{"aliases":["DEBIAN-CVE-2026-6040","GHSA-pp4w-c8m6-4xvf","UBUNTU-CVE-2026-6040"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"LibreOffice","requires_auth":"none","summary":"A heap use-after-free in LibreOffice allows attackers to execute arbitrary code or cause denial of service via a malformed ODF number format.","user_interaction":"required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Document Fdn.","cpe":[],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-825","name":"Expired Pointer Dereference"},{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-416","name":"Use After Free"}],"description":"A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.","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":"Heap use-after-free in ODF number-format blank-width parsing","id":"CVE-2026-6040","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Buzz Comments \u003c= 0.9.4 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Custom Buzz Avatar' Setting","id":"CVE-2026-6041"},"packages":[],"prev":{"headline":"Heap buffer overflow in DXF polyline import","id":"CVE-2026-6039"},"products":["LibreOffice"],"published":"2026-06-15","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":"partial"},"state":"PUBLISHED","updated":"2026-07-23","vendors":["The Document Foundation"]},"summary":"A heap use-after-free in LibreOffice allows attackers to execute arbitrary code or cause denial of service via a malformed ODF number format.","url":"https://insights.sbomify.com/CVE-2026-6040/"}