{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-103679 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-103679 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-103679 is a medium-severity use after free vulnerability in tnef_project:tnef, published on 1 Oct 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-2026-103679 and fix it if it is affected.\n\nWhat it is: CVE-2026-103679 is a medium-severity use after free vulnerability in tnef_project:tnef, published on 1 Oct 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-2026-103679 in the wild and no public exploit code.\n\nAffected product: tnef_project:tnef. 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-2026-103679/ (Markdown: https://insights.sbomify.com/CVE-2026-103679/index.md)","id":"CVE-2026-103679","markdown":"https://insights.sbomify.com/CVE-2026-103679/index.md","name":"CVE-2026-103679","record":{"aliases":["DEBIAN-CVE-2026-103679","GHSA-hh3v-7rq2-8fq9","UBUNTU-CVE-2026-103679"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"TNEF parsing library","requires_auth":"none","summary":"A remote attacker can cause a denial of service by sending a crafted TNEF file that triggers a use-after-free and double-free in the tnef library.","user_interaction":"required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"fedora","cpe":[{"product":"tnef","vendor":"tnef_project"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).","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":"Tnef: use-after-free and double-free in get_body_files() via multi-value body extraction","id":"CVE-2026-103679","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":"Tnef: heap buffer overflow in find_free_number() via numbered-backup suffix generation","id":"CVE-2026-103680"},"packages":[],"prev":{"headline":"Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value","id":"CVE-2026-103678"},"products":["tnef_project:tnef"],"published":"2026-10-01","related":[{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2017-8911","kev_date_added":null,"published":"2017-05-12"},{"cvss_score":5.4,"headline":"Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value","id":"CVE-2026-103678","kev_date_added":null,"published":"2026-10-01"},{"cvss_score":3.1,"headline":"Tnef: heap buffer overflow in find_free_number() via numbered-backup suffix generation","id":"CVE-2026-103680","kev_date_added":null,"published":"2026-10-01"}],"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":"2026-10-01","vendors":["tnef_project"]},"summary":"A remote attacker can cause a denial of service by sending a crafted TNEF file that triggers a use-after-free and double-free in the tnef library.","url":"https://insights.sbomify.com/CVE-2026-103679/"}