CVE-2026-59183 OpenEXR: Signed Integer Overflow Leading to Out-of-Bounds Memory Access in Deep Tile Decoding
A signed integer overflow in OpenEXR's deep tile decoding allows attackers to cause a crash via crafted files, affecting any application using the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-59183?
CVE-2026-59183 is a medium-severity vulnerability in AcademySoftwareFoundation openexr, published on 25 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.1.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, an int32_t multiplication in OpenEXRCore's unpack_sample_table() can overflow while decoding a crafted deep tiled EXR file, producing an invalid pointer that leads to a read from an unmapped memory address and a crash. Because the overflow occurs in the standard decoding path (exr_decoding_run), any application that decodes deep tiled EXR files is affected. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
Weakness: CWE-190
Which versions are affected by CVE-2026-59183?
How do I fix CVE-2026-59183?
Upgrade to a fixed version.
Is CVE-2026-59183 being exploited?
There is no known exploitation of CVE-2026-59183 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-59183, DEBIAN-CVE-2026-59183, ECHO-383b-727d-c60a, GHSA-rqp5-pmwm-wj6x, MINI-424f-8xxm-hf57, UBUNTU-CVE-2026-59183.