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      "text": "Moderate"
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    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
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        "url": "https://www.first.org/tlp/"
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    "lang": "en",
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      {
        "category": "summary",
        "text": "An update for python-urllib3 is now available for Red Hat Enterprise Linux 8.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "The python-urllib3 package provides the Python HTTP module with connection pooling and file POST abilities.\n\nSecurity Fix(es):\n\n* python-urllib3: CRLF injection via HTTP request method (CVE-2020-26137)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
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        "summary": "https://access.redhat.com/errata/RHSA-2021:1631",
        "url": "https://access.redhat.com/errata/RHSA-2021:1631"
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        "summary": "https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/",
        "url": "https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/"
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        "url": "https://access.redhat.com/security/data/csaf/v2/advisories/2021/rhsa-2021_1631.json"
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    ],
    "title": "Red Hat Security Advisory: python-urllib3 security update",
    "tracking": {
      "current_release_date": "2024-09-18T04:29:55+00:00",
      "generator": {
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      "initial_release_date": "2021-05-18T15:33:20+00:00",
      "revision_history": [
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          "date": "2021-05-18T15:33:20+00:00",
          "number": "1",
          "summary": "Initial version"
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          "number": "2",
          "summary": "Last updated version"
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          "number": "3",
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  "vulnerabilities": [
    {
      "cve": "CVE-2020-26137",
      "cwe": {
        "id": "CWE-113",
        "name": "Improper Neutralization of CRLF Sequences in HTTP Headers (\u0027HTTP Request/Response Splitting\u0027)"
      },
      "discovery_date": "2020-09-09T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1883632"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in python-urllib3. The HTTPConnection.request() does not properly validate CRLF sequences in the HTTP request method, potentially allowing manipulation of the request by injecting additional HTTP headers. The highest threat from this vulnerability is to confidentiality and integrity.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "python-urllib3: CRLF injection via HTTP request method",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "* Red Hat OpenShift Container Platform (OCP) 4 delivers the python-urllib3 package, which includes a vulnerable version of the urllib3 module, however from OCP 4.6, the python-urllib3 package is no longer shipped and will not be fixed.\n* In Red Hat OpenStack Platform, because the flaw has a lower impact and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP python-urllib3 package.\n\nNote: Versions of `python-pip` are marked as not affected because there is no way for a pip user to control the HTTP request method.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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        ]
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      "references": [
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-26137"
        },
        {
          "category": "external",
          "summary": "RHBZ#1883632",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1883632"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-26137",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-26137"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-26137",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26137"
        }
      ],
      "release_date": "2020-02-10T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:1631"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "python-urllib3: CRLF injection via HTTP request method"
    }
  ]
}