Pillow tiled-TIFF decoder reads past tile buffer in copy4 (Unpack.c:1290)

{
  "id": "60f04797bac26fe9907a520084ec4a66a45bfd3ae0d36b16b4bdce301433da75",
  "url": "https://osv.dev/vulnerability/BIT-pillow-2026-112395",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Pillow tiled-TIFF decoder reads past tile buffer in copy4 (Unpack.c:1290)",
    "summary": "Pillow is a Python imaging library. From 8.2.0 until 13.0.0, Pillow's tiled-TIFF decoder can read past the tile buffer while copying four-byte pixels. In _decodeTile, libtiff can return a tile allocation smaller than the required row stride multiplied by the tile length, and Pillow's stride-and-copy loop walks beyond that allocation. An attacker can supply a crafted tiled TIFF to an application that loads it. This can expose adjacent heap data in pixels or crash the process. This issue is fixed in version 13.0.0.",
    "evidence": "osv:BIT-pillow-2026-112395",
    "products": [
      {
        "name": {
          "value": "pillow",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "13.0.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "BIT-pillow-2026-112395",
      "aliases": [
        "BIT-pillow-2026-112395",
        "CVE-2026-112395",
        "GHSA-462x-pgg6-55fp"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "8.2.0"
                },
                {
                  "fixed": "13.0.0"
                }
              ]
            }
          ],
          "package": {
            "name": "pillow",
            "purl": "pkg:bitnami/pillow",
            "ecosystem": "Bitnami"
          },
          "severity": [
            {
              "type": "CVSS_V3",
              "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
            }
          ],
          "database_specific": {
            "source": "https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-112395.json"
          }
        }
      ],
      "modified": "2026-10-27T09:30:02.462926978Z",
      "provider": "osv",
      "references": [
        "https://github.com/python-pillow/Pillow/commit/76869efdbbf2ad7dccd7536520fb61b7a00ab61e",
        "https://github.com/python-pillow/Pillow/releases/tag/13.0.0",
        "https://github.com/python-pillow/Pillow/security/advisories/GHSA-462x-pgg6-55fp",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-112395"
      ],
      "provider_metadata": {
        "cpes": [
          "cpe:2.3:a:python:pillow:*:*:*:*:*:python:*:*"
        ],
        "severity": "High"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-112395",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 461034,
  "published_at": "2026-10-26T05:55:37.036+00:00"
}