EUVD-2026-18062
CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.7, an attacker providing a crafted .exr file with HTJ2K compression and a channel width of 32768 can write controlled data beyond the output heap buffer in any application that decodes EXR images. The write primitive is 2 bytes per overflow iteration or 4 bytes (by another path), repeating for each additional pixel past the overflow point. In this context, a heap write overflow can lead to remote code execution on systems. This issue has been patched in version 3.4.7.
Analysis
Heap buffer overflow in OpenEXR 3.4.0 through 3.4.6 allows remote code execution when processing maliciously crafted EXR image files with HTJ2K compression and specific channel width configurations. The vulnerability enables controlled heap overwrites of 2-4 bytes per iteration beyond allocated buffer boundaries, exploitable through user interaction with weaponized .exr files. …
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Remediation
Within 24 hours: Identify all systems running OpenEXR versions 3.4.0-3.4.6 (check /usr/lib/libOpenEXR.so* or application dependencies). Within 7 days: Deploy OpenEXR 3.4.7 or later across all affected systems; coordinate with teams using VFX software, 3D applications, and image processing tools that bundle OpenEXR. …
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External POC / Exploit Code
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