pillow — security advisory

{
  "id": "9c5922f03e3292bbf16e50da978757dd9136a4990d375fb24d72b0697dbc5dd2",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-40192",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-40192",
    "summary": "Pillow is a Python imaging library. Versions 10.3.0 through 12.1.1 did not limit the amount of GZIP-compressed data read when decoding a FITS image, making them vulnerable to decompression bomb attacks. A specially crafted FITS file could cause unbounded memory consumption, leading to denial of service (OOM crash or severe performance degradation). If users are unable to immediately upgrade, they should only open specific image formats, excluding FITS, as a workaround.",
    "evidence": "osv:DEBIAN-CVE-2026-40192",
    "products": [
      {
        "name": {
          "value": "pillow",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "11.1.0-5+deb13u2",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "11.1.0-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "11.1.0-5+deb13u1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pillow",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "12.2.0-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "11.1.0-5",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "11.2.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "11.3.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "12.0.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "12.1.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "12.1.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "12.1.1-2",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2026-40192",
      "aliases": [
        "DEBIAN-CVE-2026-40192"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "11.1.0-5+deb13u2"
                }
              ]
            }
          ],
          "package": {
            "name": "pillow",
            "purl": "pkg:deb/debian/pillow?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "11.1.0-5",
            "11.1.0-5+deb13u1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40192.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "12.2.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "pillow",
            "purl": "pkg:deb/debian/pillow?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "11.1.0-5",
            "11.2.1-1",
            "11.3.0-1",
            "12.0.0-1",
            "12.1.0-1",
            "12.1.1-1",
            "12.1.1-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40192.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-27T09:47:41.642481254Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-40192"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-40192"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-40192",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 461153,
  "published_at": "2026-04-15T23:16:10.053+00:00"
}