{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-103680 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-103680 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-103680 is a low-severity memory corruption 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-2026-103680 and fix it if it is affected.\n\nWhat it is: CVE-2026-103680 is a low-severity memory corruption 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-2026-103680 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-2026-103680/ (Markdown: https://insights.sbomify.com/CVE-2026-103680/index.md)","id":"CVE-2026-103680","markdown":"https://insights.sbomify.com/CVE-2026-103680/index.md","name":"CVE-2026-103680","record":{"aliases":["DEBIAN-CVE-2026-103680","GHSA-qr96-v34j-wcrq","UBUNTU-CVE-2026-103680"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"TNEF parsing library","requires_auth":"none","summary":"Heap buffer overflow in tnef library allows DoS or code execution via crafted TNEF files when numbered backups are enabled.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"fedora","cpe":[{"product":"tnef","vendor":"tnef_project"}],"cvss":{"score":3.1,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"A flaw was found in tnef. A heap-based buffer overflow can occur in the find_free_number() function when generating numbered backup suffixes for duplicate filenames. When numbered backups are enabled and file overwriting is disabled, an attacker can supply a specially crafted Transport Neutral Encapsulation Format (TNEF) file with an excessive number of colliding attachment filenames, causing the numeric counter to write past the allocated memory buffer. This issue may result in an application crash, leading to a Denial of Service (DoS), or potentially arbitrary code execution.","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: heap buffer overflow in find_free_number() via numbered-backup suffix generation","id":"CVE-2026-103680","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Frontend Dashboard \u003c 3.0.0 - Subscriber+ Profile and Post Field Deletion via fed_user_profile_delete","id":"CVE-2026-103681"},"packages":[],"prev":{"headline":"Tnef: use-after-free and double-free in get_body_files() via multi-value body extraction","id":"CVE-2026-103679"},"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":6.5,"headline":"Tnef: use-after-free and double-free in get_body_files() via multi-value body extraction","id":"CVE-2026-103679","kev_date_added":null,"published":"2026-10-01"},{"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"}],"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":"Heap buffer overflow in tnef library allows DoS or code execution via crafted TNEF files when numbered backups are enabled.","url":"https://insights.sbomify.com/CVE-2026-103680/"}