{"id":"PYSEC-2026-356","summary":"imgaug contains an insecure deserialization vulnerability in BackgroundAugmenter class within multicore.py module","details":"The imgaug library thru 0.4.0 contains an insecure deserialization vulnerability in its BackgroundAugmenter class within the multicore.py module. The class uses Python's pickle module to deserialize data received via a multiprocessing queue in the _augment_images_worker() method without any safety checks. An attacker who can influence the data placed into this queue (e.g., through social engineering, malicious input scripts, or a compromised shared queue) can provide a malicious pickle payload. When deserialized, this payload can execute arbitrary code in the context of the worker process, leading to remote or local code execution depending on the deployment scenario.","aliases":["CVE-2026-31235","GHSA-g82g-j283-hj97"],"modified":"2026-07-01T20:22:54.401793Z","published":"2026-06-29T11:50:50.309063Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31235"},{"type":"PACKAGE","url":"https://github.com/aleju/imgaug"},{"type":"WEB","url":"https://www.notion.so/CVE-2026-31235-35d1e139318881efb701d814228424a9"},{"type":"PACKAGE","url":"https://pypi.org/project/imgaug"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-g82g-j283-hj97"}],"affected":[{"package":{"name":"imgaug","ecosystem":"PyPI","purl":"pkg:pypi/imgaug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.4.0"}]}],"versions":["0.2.0","0.2.1","0.2.3","0.2.4","0.2.5","0.2.6","0.2.7","0.2.8","0.2.9","0.3.0","0.4.0"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/imgaug/PYSEC-2026-356.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:H/I:H/A:H"}]}