Security advisory

{
  "id": "7f5d8f48e3dfe29ddf3e1f4c2c348259b91220cfc78dbd6c1877ddcbbd025f98",
  "url": "https://osv.dev/vulnerability/CVE-2021-23437",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-23437",
    "summary": "The package pillow 5.2.0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.",
    "evidence": "osv:CVE-2021-23437",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-23437",
      "aliases": [
        "BIT-pillow-2021-23437",
        "CVE-2021-23437",
        "GHSA-98vv-pw6r-q6q4",
        "PYSEC-2021-317",
        "SNYK-PYTHON-PILLOW-1319443"
      ],
      "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": [
            {
              "repo": "https://github.com/python-pillow/pillow",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c28bf86b7e752a9257a0d4451ca878c1385db15c"
                },
                {
                  "fixed": "8013f130a5077b238a4346b73e149432b180a8ea"
                },
                {
                  "fixed": "9e08eb8f78fdfd2f476e1b20b7cf38683754866b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.2.0"
                      },
                      {
                        "fixed": "8.3.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9e08eb8f78fdfd2f476e1b20b7cf38683754866b"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "8.3.1",
            "8.3.0",
            "8.2.0",
            "8.1.0",
            "8.0.0",
            "7.2.0",
            "7.1.0",
            "7.0.0",
            "6.2.0",
            "6.1.0",
            "6.0.0",
            "5.4.0",
            "5.3.0",
            "5.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23437.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:32.198880201Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT/",
        "https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html",
        "https://security.gentoo.org/glsa/202211-10",
        "https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b",
        "https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  },
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-23437",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385505,
  "published_at": "2021-09-03T16:15:08.317+00:00"
}