CVE-2026-96638 (GCVE-0-2026-96638)
Vulnerability from cvelistv5
Published
2026-10-21 20:47
Modified
2026-10-28 18:21
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Summary
Pillow is a Python imaging library. From 9.1.0 until 13.0.0, BmpRleDecoder.decode() in src/PIL/BmpImagePlugin.py permits crafted RLE BMP delta escapes and absolute-mode runs to append beyond the remaining dest_length without a per-branch cap. A delta can add roughly 255 image rows in one iteration, so a kilobyte-sized file with a large but permitted width can expand the data bytearray to hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.
Impacted products
Vendor Product Version
python-pillow Pillow Version: >= 9.1.0, < 13.0.0
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Show details on NVD website


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                "timestamp": "2026-10-28T18:20:26.959004Z",
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            "confidentialityImpact": "NONE",
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        "advisory": "GHSA-24rc-8hj2-v98c",
        "discovery": "UNKNOWN"
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      "title": "Pillow: BMP RLE decoder memory-amplification DoS via unbounded delta escape / absolute mode"
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    "dateReserved": "2026-09-23T14:35:50.130Z",
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