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    CVE-2019-11236

    In the urllib3 library through 1.24.1 for Python, CRLF injection is possible if the attacker controls the request parameter.

    Published:Mar 13, 2019
    Last Modified:Nov 21, 2024
    EPS:Apr 15, 2019
    EPSS Score:0.00636
    CVSS Score:6.1

    Affected Products

    Vendor
    Python
    Product
    Urllib3
    Vendor
    Redhat
    Product
    Ansible Tower
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Openshift

    Exploits

    https://github.com/urllib3/urllib3/issues/1553https://github.com/urllib3/urllib3/issues/1553

    Related CVEs

    CVE-2026-44431 (CVSS 8.2) — urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from …
    CVE-2026-44432 (CVSS 8.9) — urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole r…
    CVE-2026-21441 (CVSS 8.9) — urllib3 is an HTTP client library for Python. urllib3's streaming API is designed for the efficient handling o…
    CVE-2025-66471 (CVSS 8.9) — urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.0 and prior to 2.6.0, the Str…
    CVE-2025-66418 (CVSS 8.9) — urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the nu…
    CVE-2025-50182 (CVSS 5.3) — urllib3 is a user-friendly HTTP client library for Python. Starting in version 2.2.0 and prior to 2.5.0, urlli…
    CVE-2025-50181 (CVSS 5.3) — urllib3 is a user-friendly HTTP client library for Python. Prior to 2.5.0, it is possible to disable redirects…
    CVE-2024-37891 (CVSS 4.4) — urllib3 is a user-friendly HTTP client library for Python. When using urllib3's proxy support with `ProxyMana…
    CVE-2018-25091 (CVSS 6.1) — urllib3 before 1.24.2 does not remove the authorization HTTP header when following a cross-origin redirect (i.…
    CVE-2023-45803 (CVSS 4.2) — urllib3 is a user-friendly HTTP client library for Python. urllib3 previously wouldn't remove the HTTP request…

    References

    http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html
    http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html
    https://access.redhat.com/errata/RHSA-2019:2272
    https://access.redhat.com/errata/RHSA-2019:3335
    https://access.redhat.com/errata/RHSA-2019:3590
    https://github.com/urllib3/urllib3/issues/1553
    https://lists.debian.org/debian-lts-announce/2019/06/msg00016.html
    https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
    https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKGPJLVLVYCL4L4B4G5TIOTVK4BKPG72/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R62XGEYPUTXMRHGX5I37EBCGQ5COHGKR/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TBI45HO533KYHNB5YRO43TBYKA3E3VRL/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOSA2NT4DUQDBEIWE6O7KKD24XND7TE2/
    https://usn.ubuntu.com/3990-1/
    https://usn.ubuntu.com/3990-2/
    http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html
    http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html
    https://access.redhat.com/errata/RHSA-2019:2272
    https://access.redhat.com/errata/RHSA-2019:3335
    https://access.redhat.com/errata/RHSA-2019:3590
    https://github.com/urllib3/urllib3/issues/1553
    https://lists.debian.org/debian-lts-announce/2019/06/msg00016.html
    https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
    https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKGPJLVLVYCL4L4B4G5TIOTVK4BKPG72/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R62XGEYPUTXMRHGX5I37EBCGQ5COHGKR/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TBI45HO533KYHNB5YRO43TBYKA3E3VRL/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOSA2NT4DUQDBEIWE6O7KKD24XND7TE2/
    https://usn.ubuntu.com/3990-1/
    https://usn.ubuntu.com/3990-2/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High