{"id":"CVE-2026-120252","published":"2026-11-01T01:17:19.287","lastModified":"2026-11-01T01:17:19.287","description":"imagecodecs 2023.1.23 through 2026.10.10 contains a stack-based buffer overflow vulnerability in the lossless JPEG Define Huffman Table parser in decode_jpegsof3(). Attackers can supply a crafted lossless JPEG whose DHT symbol counts wrap an 8-bit sum, overflowing the 32-entry HufVal and HufSz stack arrays and crashing the calling process.","cvssScore":5.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwes":["CWE-121"],"vendors":[],"products":[],"references":[{"url":"https://github.com/cgohlke/imagecodecs","tags":[]},{"url":"https://github.com/cgohlke/imagecodecs/blob/v2026.10.10/3rdparty/jpegsof3/jpegsof3.cpp#L394","tags":[]},{"url":"https://github.com/cgohlke/imagecodecs/issues/157","tags":[]},{"url":"https://www.vulncheck.com/advisories/imagecodecs-2023.1.23-through-2026.10.10-stack-buffer-overflow-via-jpegsof3-decode","tags":[]}],"exploitRefs":[{"url":"https://github.com/cgohlke/imagecodecs","tags":[]},{"url":"https://github.com/cgohlke/imagecodecs/blob/v2026.10.10/3rdparty/jpegsof3/jpegsof3.cpp#L394","tags":[]},{"url":"https://github.com/cgohlke/imagecodecs/issues/157","tags":[]}],"hasPoc":true,"ai":null}