{"id":"CVE-2026-59186","title":"OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry","summary":"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 …","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","cwe":["CWE-122","CWE-190","CWE-787"],"published":"2026-08-25","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:07:31.353","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59186","references":[{"url":"https://github.com/AcademySoftwareFoundation/openexr/commit/71907b44ce9a1b05bf3934b8a7821752750731ab","label":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/commit/904141d3a1f86327ad1e2b93fc92ce2dd5881d34","label":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/commit/b1a5887372772d79328f4eb42b7f86352a38170b","label":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-f667-c4wm-c8gq","label":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-f667-c4wm-c8gq","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59186.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-59186"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2523655"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-59186"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59186"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00224,"epssPercentile":0.13296,"ingestedAt":"2026-09-09T21:22:45.552Z","vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","affected":["enterprise_linux 8"],"slug":"CVE-2026-59186","body":"## Overview\n\nOpenEXR 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<Rgba> 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 8 · no fix planned: Red Hat Enterprise Linux 8 · updated 2026-09-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59186.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}