CVE-2026-59204 (GCVE-0-2026-59204)

Vulnerability from cvelistv5 – Published: 2026-07-14 15:38 – Updated: 2026-07-14 15:38
VLAI
Title
Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service
Summary
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.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
Impacted products
Vendor Product Version
python-pillow Pillow Affected: >= 8.2.0, < 12.3.0
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        }
      ],
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            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
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          }
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      "providerMetadata": {
        "dateUpdated": "2026-07-14T15:38:29.545Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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        },
        {
          "name": "https://github.com/python-pillow/Pillow/releases/tag/12.3.0",
          "tags": [
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          ],
          "url": "https://github.com/python-pillow/Pillow/releases/tag/12.3.0"
        }
      ],
      "source": {
        "advisory": "GHSA-vjc4-5qp5-m44j",
        "discovery": "UNKNOWN"
      },
      "title": "Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59204",
    "datePublished": "2026-07-14T15:38:29.545Z",
    "dateReserved": "2026-07-02T21:05:02.923Z",
    "dateUpdated": "2026-07-14T15:38:29.545Z",
    "state": "PUBLISHED"
  },
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.