GHSA-55x5-fj6c-h6m8

    Dashboard / Vulnerabilities / GHSA-55x5-fj6c-h6m8

    GHSA-55x5-fj6c-h6m8

    Published: 13 Dec 2021Last Modified: 8 Jul 2026

    Summary: lxml's HTML Cleaner allows crafted and SVG embedded scripts to pass through

    Details: ### Impact The HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5. ### Patches The issue has been resolved in lxml 4.6.5. ### Workarounds None. ### References The issues are tracked under the report IDs GHSL-2021-1037 and GHSL-2021-1038.

    References: https://github.com/lxml/lxml/security/advisories/GHSA-55x5-fj6c-h6m8, https://nvd.nist.gov/vuln/detail/CVE-2021-43818, https://github.com/lxml/lxml/commit/12fa9669007180a7bb87d990c375cf91ca5b664a, https://github.com/lxml/lxml/commit/a3eacbc0dcf1de1c822ec29fb7d090a4b1712a9c#diff-59130575b4fb2932c957db2922977d7d89afb0b2085357db1a14615a2fcad776, https://github.com/lxml/lxml/commit/f2330237440df7e8f39c3ad1b1aa8852be3b27c0, https://www.oracle.com/security-alerts/cpujul2022.html, https://www.oracle.com/security-alerts/cpuapr2022.html, https://www.debian.org/security/2022/dsa-5043, https://security.netapp.com/advisory/ntap-20220107-0005, https://security.gentoo.org/glsa/202208-06, https://lists.fedoraproject.org/archives/list/[email protected]/message/ZQ4SPKJX3RRJK4UWA6FXCRHD2TVRQI44, https://lists.fedoraproject.org/archives/list/[email protected]/message/WZGNET2A4WGLSUXLBFYKNC5PXHQMI3I7, https://lists.fedoraproject.org/archives/list/[email protected]/message/V2XMOM5PFT6U5AAXY6EFNT5JZCKKHK2V, https://lists.fedoraproject.org/archives/list/[email protected]/message/TUIS2KE3HZ2AAQKXFLTJFZPP2IFHJTC7, https://lists.debian.org/debian-lts-announce/2021/12/msg00037.html, https://github.com/pypa/advisory-database/tree/main/vulns/lxml/PYSEC-2021-852.yaml, https://github.com/lxml/lxml

    Affected packages

    Package

    Name: lxml

    Purl: pkg:pypi/lxml

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.6.5

    Affected versions

    1.3.2
    1.3.3
    1.3.4
    1.3.5
    1.3.6

    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-55x5-fj6c-h6m8 | CVE-DB