{"id":"CVE-2026-59186","summary":"OpenEXR: Heap out-of-bounds write in TiledRgbaInputFile via integer overflow on 32-bit (ILP32) builds","details":"OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D\u003cRgba\u003e tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.","aliases":["GHSA-f667-c4wm-c8gq"],"modified":"2026-08-27T11:46:42.199049539Z","published":"2026-08-25T16:35:58.364Z","related":["openSUSE-SU-2026:11612-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-122","CWE-190","CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59186.json"},"references":[{"type":"ADVISORY","url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-f667-c4wm-c8gq"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59186.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59186"},{"type":"FIX","url":"https://github.com/AcademySoftwareFoundation/openexr/commit/71907b44ce9a1b05bf3934b8a7821752750731ab"},{"type":"FIX","url":"https://github.com/AcademySoftwareFoundation/openexr/commit/904141d3a1f86327ad1e2b93fc92ce2dd5881d34"},{"type":"FIX","url":"https://github.com/AcademySoftwareFoundation/openexr/commit/b1a5887372772d79328f4eb42b7f86352a38170b"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/academysoftwarefoundation/openexr","events":[{"introduced":"0"},{"fixed":"ba4b1af3a096e8f69e1836b210976585189a5fca"},{"introduced":"c7d3eac70ccde2c4ed484c6638b83ba872f71464"},{"fixed":"ca50a6bb1f64c4d53362e4b67aec33e67cb7d425"},{"introduced":"20a65852895894434bea88613f6d29ac8e88bd6e"},{"fixed":"777d231a179de1711d2a942810d9559216ab3f4c"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.2.11"},{"introduced":"3.3.0"},{"fixed":"3.3.13"},{"introduced":"3.4.0"},{"fixed":"3.4.14"}],"source":"AFFECTED_FIELD"}}],"versions":["v3.4.13-rc3","v3.4.13","v3.3.12-rc","v3.3.12","v3.2.10-rc","v3.2.10","v3.2.9-rc","v3.2.9","v3.3.11-rc3","v3.3.11","v3.4.13-rc2","v3.4.13-rc","v3.4.12","v3.4.12-rc2","v3.4.11-rc3","v3.4.11","v3.4.11-rc2","v3.4.11-rc","v3.4.10-rc","v3.4.10","v3.3.10-rc2","v3.3.10","v3.2.8-rc","v3.2.8","v3.3.10-rc","v3.2.7-rc","v3.2.7","v3.3.9-rc2","v3.3.9","v3.4.9","v3.3.9-rc","v3.2.6-rc","v3.2.6","v3.3.8-rc","v3.3.8","v3.4.9-rc","v3.4.8-rc","v3.4.8","v3.4.7","v3.4.7-rc","v3.4.6","v3.4.6-rc","v3.2.5-rc","v3.2.5","v3.3.7-rc4","v3.3.7","v3.4.5","v3.4.5-rc","v3.3.7-rc3","v3.3.7-rc2","v3.3.7-rc","v3.3.6","v3.4.4-rc2","v3.4.4","v3.4.4-rc","v3.4.3-rc3","v3.4.3","v3.3.6-rc4","v3.3.6-rc3","v3.4.3-rc2","v3.2.4-rc2","v3.2.4","v3.3.6-rc2","v3.4.3-rc","v3.3.6-rc","v3.3.5","v3.4.2-rc2","v3.4.2","v3.4.2-rc","v3.4.1-rc2","v3.4.1","v3.4.1-rc","v3.4.0","v3.3.5-rc3","v3.3.5-rc","v3.3.4-rc","v3.3.4","v3.3.3-rc1","v3.3.3","v3.3.3-rc","v3.3.2-rc4","v3.3.2","v3.3.2-rc3","v3.3.2-rc2","v3.3.2-rc","v3.3.1-rc","v3.3.1","v3.3.0-rc2","v3.3.0","v3.2.4-rc","v3.2.3-rc2","v3.2.3","v3.2.3-rc","v3.2.2","v3.2.2-rc2","v3.2.2-rc","v3.2.1-rc","v3.2.1","v3.2.0-rc4","v3.2.0","v3.2.0-rc3","v3.2.0-rc2","v3.2.0-rc","v3.0.0-beta","v2.5.0","v2.4.0","v2.4.0-beta.1","v2.3.0","v2.1.0","v2.0.1","v2.0.0.GM","v2.0.0","v1.7.1","OPENEXR_1_0_4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59186.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H"}]}