{"id":"JLSEC-2026-142","details":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in `generic_unpack()`. By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","modified":"2026-07-25T18:23:47.393657166Z","published":"2026-04-17T15:19:54.657Z","upstream":["CVE-2026-34378"],"database_specific":{"sources":[{"id":"CVE-2026-34378","imported":"2026-07-17T21:13:59.841Z","modified":"2026-06-17T10:38:58.603Z","published":"2026-04-06T16:16:35.057Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34378","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34378","database_specific":{"status":"Analyzed"}}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9"},{"type":"WEB","url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-v76p-4qvv-vh4g"}],"affected":[{"package":{"name":"OpenEXR_jll","ecosystem":"Julia","purl":"pkg:julia/OpenEXR_jll?uuid=18a262bb-aa17-5467-a713-aee519bc75cb"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.4.4+0"},{"fixed":"3.4.9+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-142.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}