GHSA-5phf-pp7p-vc2r

    Dashboard / Vulnerabilities / GHSA-5phf-pp7p-vc2r

    GHSA-5phf-pp7p-vc2r

    Published: 19 Mar 2021Last Modified: 8 Jul 2026

    Summary: Using default SSLContext for HTTPS requests in an HTTPS proxy doesn't verify certificate hostname for proxy connection

    Details: ### Impact Users who are using an HTTPS proxy to issue HTTPS requests and haven't configured their own SSLContext via `proxy_config`. Only the default SSLContext is impacted. ### Patches [urllib3 >=1.26.4 has the issue resolved](https://github.com/urllib3/urllib3/releases/tag/1.26.4). urllib3<1.26 is not impacted due to not supporting HTTPS requests via HTTPS proxies. ### Workarounds Upgrading is recommended as this is a minor release and not likely to break current usage. Configuring an `SSLContext` with `check_hostname=True` and passing via `proxy_config` instead of relying on the default `SSLContext` ### For more information If you have any questions or comments about this advisory: * Email us at [[email protected]](mailto:[email protected])

    References: https://github.com/urllib3/urllib3/security/advisories/GHSA-5phf-pp7p-vc2r, https://nvd.nist.gov/vuln/detail/CVE-2021-28363, https://github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a3118b0, https://github.com/pypa/advisory-database/tree/main/vulns/urllib3/PYSEC-2021-59.yaml, https://github.com/pypa/advisory-db/tree/main/vulns/urllib3/PYSEC-2021-59.yaml, https://github.com/urllib3/urllib3, https://github.com/urllib3/urllib3/blob/main/CHANGES.rst#1264-2021-03-15, https://github.com/urllib3/urllib3/commits/main, https://github.com/urllib3/urllib3/releases/tag/1.26.4, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL, https://lists.fedoraproject.org/archives/list/[email protected]/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL, https://pypi.org/project/urllib3/1.26.4, https://security.gentoo.org/glsa/202107-36, https://security.gentoo.org/glsa/202305-02, https://security.netapp.com/advisory/ntap-20240621-0007, https://www.oracle.com/security-alerts/cpuoct2021.html

    Affected packages

    Package

    Name: urllib3

    Purl: pkg:pypi/urllib3

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 1.26.0
    Fixed -1.26.4

    Affected versions

    1.26.0
    1.26.1
    1.26.2
    1.26.3

    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
    GHSA-5phf-pp7p-vc2r | CVE-DB