In Exiv2 0.26, there is a heap-based buffer over-read in the Exiv2::Image::byteSwap4 function in image.cpp. Remote attackers can exploit this vulnerability to disclose memory data or cause a denial of service via a crafted TIFF file.
"https://github.com/pypa/advisory-database/blob/main/vulns/exiv2/PYSEC-2018-122.yaml"