{"id":"PYSEC-2026-2800","summary":"Out-of-bounds Read in OpenCV","details":"An out-of-bounds read was discovered in OpenCV before 4.1.1 (OpenCV-Python before 4.1.0.25). Specifically, variable coarsest_scale is assumed to be greater than or equal to finest_scale within the calc()/ocl_calc() functions in dis_flow.cpp. However, this is not true when dealing with small images, leading to an out-of-bounds read of the heap-allocated arrays Ux and Uy.","aliases":["CVE-2019-19624","GHSA-jggw-2q6g-c3m6","PYSEC-2026-2824","PYSEC-2026-2839","PYSEC-2026-723"],"modified":"2026-07-13T16:42:38.267494498Z","published":"2026-07-09T16:49:37.840883Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-19624"},{"type":"WEB","url":"https://github.com/opencv/opencv/issues/14554"},{"type":"WEB","url":"https://github.com/opencv/opencv/commit/d1615ba11a93062b1429fce9f0f638d1572d3418"},{"type":"WEB","url":"https://access.redhat.com/security/cve/cve-2019-19624"},{"type":"PACKAGE","url":"https://github.com/opencv/opencv-python"},{"type":"WEB","url":"https://github.com/opencv/opencv-python/releases/tag/25"},{"type":"PACKAGE","url":"https://pypi.org/project/opencv-contrib-python"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-jggw-2q6g-c3m6"}],"affected":[{"package":{"name":"opencv-contrib-python","ecosystem":"PyPI","purl":"pkg:pypi/opencv-contrib-python"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0.25"}]}],"versions":["3.4.10.35","3.4.10.37","3.4.11.39","3.4.11.41","3.4.11.43","3.4.11.45","3.4.13.47","3.4.14.51","3.4.14.53","3.4.15.55","3.4.16.57","3.4.16.59","3.4.17.61","3.4.17.63","3.4.18.65","3.4.2.17","3.4.3.18","3.4.4.19","3.4.5.20","3.4.6.27","3.4.7.28","3.4.8.29","3.4.9.31","3.4.9.33","4.0.0.21","4.0.1.23","4.0.1.24"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/opencv-contrib-python/PYSEC-2026-2800.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"}]}