Red Hat Security Advisory: python-urllib3 security update

{
  "id": "59207794054ee1c508c80c776064571ef0bccf2608d90316c00cb2cabd2fc64f",
  "url": "https://osv.dev/vulnerability/RHSA-2026%3A1254",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Red Hat Security Advisory: python-urllib3 security update",
    "summary": "Red Hat Security Advisory: python-urllib3 security update",
    "evidence": "osv:RHSA-2026:1254",
    "products": [
      {
        "name": {
          "value": "python-urllib3",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0:1.24.2-9.el8_10",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-urllib3",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0:1.24.2-9.el8_10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "RHSA-2026:1254",
      "aliases": [
        "RHSA-2026:1254"
      ],
      "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": "0:1.24.2-9.el8_10"
                }
              ]
            }
          ],
          "package": {
            "name": "python-urllib3",
            "purl": "pkg:rpm/redhat/python-urllib3",
            "ecosystem": "Red Hat:enterprise_linux:8::baseos"
          },
          "database_specific": {
            "source": "https://security.access.redhat.com/data/osv/RHSA-2026:1254.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
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                }
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          ],
          "package": {
            "name": "python3-urllib3",
            "purl": "pkg:rpm/redhat/python3-urllib3",
            "ecosystem": "Red Hat:enterprise_linux:8::baseos"
          },
          "database_specific": {
            "source": "https://security.access.redhat.com/data/osv/RHSA-2026:1254.json"
          }
        }
      ],
      "modified": "2026-10-20T10:04:48Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-66418",
        "CVE-2025-66471",
        "CVE-2026-21441"
      ],
      "references": [
        "https://access.redhat.com/errata/RHSA-2026:1254",
        "https://access.redhat.com/security/updates/classification/#important",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2419455",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2419467",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2427726",
        "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_1254.json",
        "https://access.redhat.com/security/cve/CVE-2025-66418",
        "https://www.cve.org/CVERecord?id=CVE-2025-66418",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-66418",
        "https://github.com/urllib3/urllib3/commit/24d7b67eac89f94e11003424bcf0d8f7b72222a8",
        "https://github.com/urllib3/urllib3/security/advisories/GHSA-gm62-xv2j-4w53",
        "https://access.redhat.com/security/cve/CVE-2025-66471",
        "https://www.cve.org/CVERecord?id=CVE-2025-66471",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-66471",
        "https://github.com/urllib3/urllib3/commit/c19571de34c47de3a766541b041637ba5f716ed7",
        "https://github.com/urllib3/urllib3/security/advisories/GHSA-2xpw-w6gg-jr37",
        "https://access.redhat.com/security/cve/CVE-2026-21441",
        "https://www.cve.org/CVERecord?id=CVE-2026-21441",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-21441",
        "https://github.com/urllib3/urllib3/commit/8864ac407bba8607950025e0979c4c69bc7abc7b",
        "https://github.com/urllib3/urllib3/security/advisories/GHSA-38jv-5279-wg99"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-66418",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-66471",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-21441",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 377941,
  "published_at": "2026-02-11T10:08:19+00:00"
}