Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-59204US | high7.5 | — | ||
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 reco… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11caFIX
- https://github.com/python-pillow/Pillow/pull/9704FIX
- https://github.com/python-pillow/Pillow/releases/tag/12.3.0ARTICLE
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44jADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-59204WEB
scry
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