Find a vulnerability

{
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        {
          "product": "Pillow",
          "vendor": "python-pillow",
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        {
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          "value": "Pillow is a Python imaging library. From 11.2.1 until 13.0.0, Arrow export assumes that an image\u0027s rows are tightly contiguous and exports from im-\u003eblocks[0].ptr even when PILLOW_ALIGNMENT makes aligned_linesize include row padding or an aligned offset before the first row. The resulting Arrow buffer can include uninitialized padding, bytes preceding the first row, or stale heap contents from previously freed images. Applications that configure alignment and export images to Arrow can therefore disclose one user\u0027s pixels or other process memory to another user. This issue is fixed in version 13.0.0."
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              "cweId": "CWE-226",
              "description": "CWE-226: Sensitive Information in Resource Not Removed Before Reuse",
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          ]
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        {
          "descriptions": [
            {
              "cweId": "CWE-908",
              "description": "CWE-908: Use of Uninitialized Resource",
              "lang": "en",
              "type": "CWE"
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        }
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        "dateUpdated": "2026-10-21T21:17:09.748Z",
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          "name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-654x-cwwv-5j9c",
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          "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-654x-cwwv-5j9c"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/pull/10172",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-pillow/Pillow/pull/10172"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/commit/19f64946eb247b973dd4560be7dea3bf979d2e6a",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/python-pillow/Pillow/commit/19f64946eb247b973dd4560be7dea3bf979d2e6a"
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      ],
      "source": {
        "advisory": "GHSA-654x-cwwv-5j9c",
        "discovery": "UNKNOWN"
      },
      "title": "Pillow: Arrow export leaks stale heap memory when PILLOW_ALIGNMENT \u003e 1"
    }
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    "dateReserved": "2026-10-21T16:15:06.491Z",
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          "value": "Pillow is a Python imaging library. From 11.0.0 until 13.0.0, multi-frame loaders can retain an ImagingCore allocation created for a narrow frame mode while a later frame of the same dimensions changes the logical mode and decoder tiles to wider RGB or CMYK data. ImageFile.load_prepare() reuses the stale native storage because _im is non-null without verifying that its mode and size still match. Crafted PSD, MPO, DCX, or MIC frame transitions can then write wider pixels into the narrow allocation, causing native out-of-bounds writes and crashes. The MPO path can also cause a native over-read and, in demonstrated runtime-specific profiles, command execution. This issue is fixed in version 13.0.0."
        }
      ],
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            {
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          "name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-v9pv-5gc8-w2m6",
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        {
          "name": "https://github.com/python-pillow/Pillow/commit/78d97d994579aef81aafe123773d525f40f2522a",
          "tags": [
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          "url": "https://github.com/python-pillow/Pillow/commit/78d97d994579aef81aafe123773d525f40f2522a"
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        {
          "name": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0",
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          "url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0"
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      ],
      "source": {
        "advisory": "GHSA-v9pv-5gc8-w2m6",
        "discovery": "UNKNOWN"
      },
      "title": "Pillow multi-frame loaders can reuse stale native image storage after mode transitions"
    }
  },
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    "cveId": "CVE-2026-96639",
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              "version": "\u003c 13.0.0"
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        {
          "lang": "en",
          "value": "Pillow is a Python imaging library. Prior to 13.0.0, MpoImageFile.seek() and DcxImageFile.seek() reparse later MPO or DCX frames and replace self._size without rerunning Image._decompression_bomb_check(). A crafted multi-frame image can use a tiny first frame to pass Image.open() and then declare an over-limit later frame. Normal frame iteration through seek(), load(), or ImageSequence.Iterator can decode that frame and commit hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0."
        }
      ],
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        {
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            "attackComplexity": "LOW",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
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            "userInteraction": "REQUIRED",
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              "description": "CWE-400: Uncontrolled Resource Consumption",
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            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-409",
              "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)",
              "lang": "en",
              "type": "CWE"
            }
          ]
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        "dateUpdated": "2026-10-21T21:05:20.850Z",
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        {
          "name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-p8hx-v2p6-rp84",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-p8hx-v2p6-rp84"
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        {
          "name": "https://github.com/python-pillow/Pillow/pull/10011",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-pillow/Pillow/pull/10011"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0"
        }
      ],
      "source": {
        "advisory": "GHSA-p8hx-v2p6-rp84",
        "discovery": "UNKNOWN"
      },
      "title": "Pillow: Decompression-bomb protection bypass via multi-frame seek() in MPO and DCX (MpoImageFile.seek / DcxImageFile.seek)"
    }
  },
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-96636",
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    "dateReserved": "2026-09-23T14:35:50.130Z",
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      ],
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        {
          "lang": "en",
          "value": "Pillow is a Python imaging library. From 5.1.0 until 13.0.0, PdfParser.linearize_page_tree() in src/PIL/PdfParser.py treats a PDF /Pages graph as a tree without tracking duplicate indirect references. When Image.save(..., format=\"PDF\", append=True) processes an attacker-controlled existing PDF whose /Kids arrays repeatedly reference the same child /Pages node, Pillow expands the shared subtree as distinct pages. A compact malformed PDF can therefore create exponentially many page references and consume disproportionate CPU before the append completes. This issue is fixed in version 13.0.0."
        }
      ],
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            "attackComplexity": "LOW",
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            "subConfidentialityImpact": "NONE",
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              "description": "CWE-400: Uncontrolled Resource Consumption",
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            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-407",
              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T21:03:22.785Z",
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        {
          "name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-mrfp-p49p-3hf2",
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            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-mrfp-p49p-3hf2"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/pull/10093",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-pillow/Pillow/pull/10093"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/commit/6f0e7ee1f9c2fe227906f8a4b926e6622b702bc7",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/python-pillow/Pillow/commit/6f0e7ee1f9c2fe227906f8a4b926e6622b702bc7"
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        {
          "name": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0",
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            "x_refsource_MISC"
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          "url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0"
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      ],
      "source": {
        "advisory": "GHSA-mrfp-p49p-3hf2",
        "discovery": "UNKNOWN"
      },
      "title": "Pillow PDF append accepts malformed shared page-tree DAG causing resource exhaustion"
    }
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    "cveId": "CVE-2026-96640",
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          "lang": "en",
          "value": "Pillow is a Python imaging library. Prior to 13.0.0, SpiderImageFile.seek() in src/PIL/SpiderImagePlugin.py reparses a later SPIDER stack frame and replaces self._size without rerunning Image._decompression_bomb_check(). A tiny file can use a safe first frame to pass Image.open() and then declare very large dimensions in a later mode F frame. Loading that frame allocates approximately four bytes per attacker-declared pixel and can consume multiple gigabytes of memory. This issue is fixed in version 13.0.0."
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              "type": "CWE"
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        {
          "name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-g842-9rc4-69pw",
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          ],
          "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-g842-9rc4-69pw"
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        {
          "name": "https://github.com/python-pillow/Pillow/pull/10076",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/python-pillow/Pillow/pull/10076"
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          "name": "https://github.com/python-pillow/Pillow/commit/7cb0e02389d8aac2a60896a490f572db0b07b841",
          "tags": [
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      "source": {
        "advisory": "GHSA-g842-9rc4-69pw",
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      "title": "Pillow: Decompression bomb check bypass in SpiderImagePlugin.seek() leads to unbounded allocation DoS"
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    "cveId": "CVE-2026-96637",
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          "lang": "en",
          "value": "Pillow is a Python imaging library. From 9.4.0 until 13.0.0, ImagingJpegEncode() in src/libImaging/JpegEncode.c can call jpeg_write_marker() for a JPEG COM comment when an ICC profile has exactly filled the 65536-byte encoder buffer. libjpeg writes one byte before checking the exhausted free_in_buffer counter, which then wraps and permits the attacker-controlled comment and subsequent compressed image data to overwrite adjacent heap memory. Re-saving an untrusted image as JPEG while preserving its ICC profile and forwarded comment can crash the process and may enable code execution in suitable runtime and heap layouts. This issue is fixed in version 13.0.0."
        }
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