{"id":"CVE-2026-111146","title":"ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed RTF properties","summary":"ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed RTF properties. Attackers can deliver a crafted winmail.dat whose decompresse…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","cwe":["CWE-125"],"vendor":"Yeraze","product":"ytnef","affected":["ytnef <= 2.1.2"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T19:17:29.040","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-111146","references":[{"url":"https://github.com/Yeraze/ytnef","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Yeraze/ytnef/blob/d9f089144414d3b0912c29ab96f8f1c591d00319/lib/ytnef.c#L1449-L1458","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Yeraze/ytnef/blob/d9f089144414d3b0912c29ab96f8f1c591d00319/lib/ytnef.c#L1605-L1614","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Yeraze/ytnef/issues/112","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/ytnef-decompressrtf-oob-read","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/ytnef-through-2.1.2-heap-out-of-bounds-read-via-mapiprint-in-lib-ytnef-c","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org","exploit-available"],"ingestedAt":"2026-10-15T19:25:46.413Z","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-15T19:38:03.696767Z"},"slug":"CVE-2026-111146","body":"## Overview\n\nytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed RTF properties. Attackers can deliver a crafted winmail.dat whose decompressed RTF lacks a NUL terminator, causing printf to over-read, crashing ytnefprint and leaking adjacent heap bytes.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":222728,"id":"CVE-2026-111146","ts":1792097065717,"field":"exploit_available","old":"false","new":"true"}]}