Vulnerability Details CVE-2026-42216
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, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. 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 20.2%
CVSS Severity
CVSS v3 Score 9.1
References
Products affected by CVE-2026-42216
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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