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PyOpenEXR EUVDEUVD-2026-65745

| CVE-2026-68514 MEDIUM
Heap-based Buffer Overflow (CWE-122)
2026-08-25 GitHub_M
Buffer Overflow Python Heap Overflow Openexr Academysoftwarefoundation
5.5
CVSS 3.1 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI
5.5 MEDIUM

File must be opened locally by a user (AV:L, UI:R); no privileges needed; only availability impacted via crash, no confidentiality or integrity loss confirmed.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Patch available
Aug 25, 2026 - 21:04 EUVD
Source Code Evidence Fetched
Aug 25, 2026 - 20:21 vuln.today
Analysis Generated
Aug 25, 2026 - 20:21 vuln.today

DescriptionCVE.org

OpenEXR is the reference implementation and specification for the EXR image file format, widely used in the motion picture industry. In versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13, the PyOpenEXR Python bindings contain a heap out-of-bounds write triggered when reading a crafted deep scanline EXR file. When a deep file declares a literal channel named left alongside layer-prefixed RGB channels left.R, left.G, and left.B, the wrapper processes the literal left channel first and allocates a scalar deep sample array for it, then reuses that same array as the coalesced destination for the prefixed RGB group. The deep reader registers sample slices with an RGB stride (three lanes) into storage that was allocated with scalar shape, so decoding the deep samples writes past the allocation. Opening such a file through the default public Python API, OpenEXR.File(path), causes a heap buffer overflow during normal deep sample decode, leading to memory corruption and a crash. This issue is fixed in versions 3.3.13 and 3.4.14.

AnalysisAI

Heap buffer overflow in PyOpenEXR Python bindings versions 3.3.0-3.3.12 and 3.4.0-3.4.13 causes memory corruption and process crash when opening a crafted deep scanline EXR file. A specific channel naming collision - a literal channel 'left' coexisting with layer-prefixed 'left.R', 'left.G', 'left.B' - causes the wrapper to allocate scalar-shaped deep sample storage and then write into it at RGB stride (three lanes), overflowing the heap allocation. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires the target application to use the PyOpenEXR Python bindings specifically (not the raw C++ OpenEXR library) and invoke the default OpenEXR.File(path) API without the separate_channels=True parameter. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 5.5 Medium with vector AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H accurately reflects the threat model: exploitation requires a victim to open a crafted file (UI:R) in a local or pipeline context (AV:L), with no confirmed confidentiality or integrity impact - only availability loss via crash and memory corruption. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary fix is to upgrade PyOpenEXR to version 3.3.13 (3.3.x branch) or 3.4.14 (3.4.x branch), as confirmed by vendor GitHub Security Advisory GHSA-mw28-66qc-c883. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 12 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected

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EUVD-2026-65745 vulnerability details – vuln.today
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