{"id":"CVE-2026-26054","published":"2026-09-24T17:17:04.553","lastModified":"2026-09-28T16:17:14.050","description":"SumatraPDF is a multi-format reader for Windows. Prior to 3.6, the MobiDoc::ParseHeader function in src/MobiDoc.cpp validates a record using kMobiHeaderMinLen but DecodeMobiDocHeader constructs a decoder sized for kMobiHeaderLen without receiving the actual remaining buffer length. A malformed MOBI file can use an attacker-controlled header length to bypass optional-field early returns and cause the decoder to read beyond a short heap buffer. Opening the crafted document can crash SumatraPDF. This issue is fixed in version 3.6.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-125"],"vendors":[],"products":[],"references":[{"url":"https://github.com/sumatrapdfreader/sumatrapdf/commit/24b9ce83383bbaa48b3efe00e4d30cccea126198","tags":[]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/issues/5318","tags":[]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/releases/tag/3.6rel","tags":[]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-27p6-wrfp-pgm8","tags":[]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-27p6-wrfp-pgm8","tags":[]}],"exploitRefs":[{"url":"https://github.com/sumatrapdfreader/sumatrapdf/commit/24b9ce83383bbaa48b3efe00e4d30cccea126198","tags":[]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/issues/5318","tags":[]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/releases/tag/3.6rel","tags":[]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-27p6-wrfp-pgm8","tags":[]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-27p6-wrfp-pgm8","tags":[]}],"hasPoc":true,"ai":null}