Vulnerability Details CVE-2026-42217
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, readVariableLengthInteger() decodes a variable-length integer from untrusted EXR input without bounding the shift count. After enough continuation bytes, the code executes a left shift by 70 on a 64-bit value, which is undefined behavior. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.9%
CVSS Severity
CVSS v3 Score 9.8
References
Products affected by CVE-2026-42217
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cpe:2.3:a:openexr:openexr:3.0.0
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cpe:2.3:a:openexr:openexr:3.0.1
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cpe:2.3:a:openexr:openexr:3.0.2
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cpe:2.3:a:openexr:openexr:3.0.3
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cpe:2.3:a:openexr:openexr:3.0.4
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cpe:2.3:a:openexr:openexr:3.0.5
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cpe:2.3:a:openexr:openexr:3.1.0
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cpe:2.3:a:openexr:openexr:3.1.1
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cpe:2.3:a:openexr:openexr:3.1.10
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cpe:2.3:a:openexr:openexr:3.1.11
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cpe:2.3:a:openexr:openexr:3.1.12
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cpe:2.3:a:openexr:openexr:3.1.13
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cpe:2.3:a:openexr:openexr:3.1.2
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cpe:2.3:a:openexr:openexr:3.1.3
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cpe:2.3:a:openexr:openexr:3.1.4
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cpe:2.3:a:openexr:openexr:3.1.5
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cpe:2.3:a:openexr:openexr:3.1.6
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cpe:2.3:a:openexr:openexr:3.1.7
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cpe:2.3:a:openexr:openexr:3.1.8
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cpe:2.3:a:openexr:openexr:3.1.9
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cpe:2.3:a:openexr:openexr:3.2.0
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cpe:2.3:a:openexr:openexr:3.2.1
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cpe:2.3:a:openexr:openexr:3.2.2
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cpe:2.3:a:openexr:openexr:3.2.3
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cpe:2.3:a:openexr:openexr:3.2.4
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cpe:2.3:a:openexr:openexr:3.2.5
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cpe:2.3:a:openexr:openexr:3.2.6
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cpe:2.3:a:openexr:openexr:3.2.7
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cpe:2.3:a:openexr:openexr:3.2.8
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cpe:2.3:a:openexr:openexr:3.3.0
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cpe:2.3:a:openexr:openexr:3.3.1
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cpe:2.3:a:openexr:openexr:3.3.10
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cpe:2.3:a:openexr:openexr:3.3.2
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cpe:2.3:a:openexr:openexr:3.3.3
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cpe:2.3:a:openexr:openexr:3.3.4
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cpe:2.3:a:openexr:openexr:3.3.5
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cpe:2.3:a:openexr:openexr:3.3.6
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cpe:2.3:a:openexr:openexr:3.3.7
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cpe:2.3:a:openexr:openexr:3.3.8
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cpe:2.3:a:openexr:openexr:3.3.9
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cpe:2.3:a:openexr:openexr:3.4.0
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cpe:2.3:a:openexr:openexr:3.4.1
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cpe:2.3:a:openexr:openexr:3.4.10
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cpe:2.3:a:openexr:openexr:3.4.2
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cpe:2.3:a:openexr:openexr:3.4.3
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cpe:2.3:a:openexr:openexr:3.4.4
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cpe:2.3:a:openexr:openexr:3.4.5
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cpe:2.3:a:openexr:openexr:3.4.6
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cpe:2.3:a:openexr:openexr:3.4.7
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cpe:2.3:a:openexr:openexr:3.4.8
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cpe:2.3:a:openexr:openexr:3.4.9