Vulnerability Details CVE-2026-59204
Pillow is a Python imaging library. From 8.2.0 through 12.2.0, src/libImaging/Jpeg2KDecode.c accumulates total_component_width across every tile in a JPEG2000 image instead of recomputing it per tile, allowing a crafted tiled JPEG2000 file to force substantially higher transient memory usage and trigger out-of-memory failures during decoding. This issue is fixed in version 12.3.0.
Exploit prediction scoring system (EPSS) score
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-59204
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cpe:2.3:a:python:pillow:10.0.0
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cpe:2.3:a:python:pillow:10.0.1
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cpe:2.3:a:python:pillow:10.1.0
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cpe:2.3:a:python:pillow:10.2.0
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cpe:2.3:a:python:pillow:10.3.0
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cpe:2.3:a:python:pillow:10.4.0
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cpe:2.3:a:python:pillow:11.0.0
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cpe:2.3:a:python:pillow:11.1.0
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cpe:2.3:a:python:pillow:11.2.1
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cpe:2.3:a:python:pillow:11.3.0
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cpe:2.3:a:python:pillow:12.0.0
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cpe:2.3:a:python:pillow:8.2.0
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cpe:2.3:a:python:pillow:8.3.0
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cpe:2.3:a:python:pillow:8.3.1
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cpe:2.3:a:python:pillow:8.3.2
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cpe:2.3:a:python:pillow:8.4.0
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cpe:2.3:a:python:pillow:9.0.0
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cpe:2.3:a:python:pillow:9.0.1
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cpe:2.3:a:python:pillow:9.1.0
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cpe:2.3:a:python:pillow:9.1.1
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cpe:2.3:a:python:pillow:9.2.0
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cpe:2.3:a:python:pillow:9.3.0
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cpe:2.3:a:python:pillow:9.4.0
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cpe:2.3:a:python:pillow:9.5.0