Buffer overflow in Academysoftwarefoundation Openexr
CVE-2026-68513
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. Versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 contain a heap buffer overflow in PyOpenEXR triggered by a channel-name key collision between literal and prefixed RGB channels. When separate_channels=false, PyOpenEXR maps each physical channel name through channelNameToRGBA() and coalesces the results into a shared RGB array. A crafted flat scanline EXR that contains both a literal channel such as left and prefixed channels such as left.R, left.G, and left.B causes these names to collide, so the wrapper reuses an undersized two-dimensional NumPy array for the coalesced RGB slices and writes out of bounds when OpenEXR.File(path) decodes the pixels. This issue is fixed in versions 3.3.13 and 3.4.14.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (8.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Academysoftwarefoundation Openexr — versions >= 3.3.0, < 3.3.13, >= 3.4.0, < 3.4.14
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-68513?
- CVE-2026-68513 is a high-severity vulnerability in Academysoftwarefoundation Openexr, classified under Heap-based Buffer Overflow. CVSS score: 7.1/10. Published 2026-08-25.
- How severe is CVE-2026-68513?
- High severity. CVSS v3 base score is 7.1 out of 10.