{"id":"CVE-2026-103678","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-103678","summary":"Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value","details":"A flaw was found in tnef. An attacker can exploit this vulnerability by providing a specially crafted file containing uncompressed Rich Text Format (RTF) data. Because the application fails to properly validate input buffer boundaries before copying data in get_rtf_data_from_buf(), reading beyond the allocated memory occurs. This flaw can cause the application to crash, leading to a Denial of Service (DoS), or leak sensitive memory contents into extracted output files.","published":"2026-10-01T11:34:48.652Z","modified":"2026-10-03T03:46:35.320495679Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-103678"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103678.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103678"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544476"},{"type":"PACKAGE","url":"https://github.com/verdammelt/tnef"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-03T03:46:35.320495679Z"}}