PYSEC-2026-912

    Dashboard / Vulnerabilities / PYSEC-2026-912

    PYSEC-2026-912

    Published: 6 Jul 2026Last Modified: 8 Jul 2026

    Summary: Denial of Service in python-ldap

    Details: python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability to cause a denial of service condition.

    References: https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcm, https://nvd.nist.gov/vuln/detail/CVE-2021-46823, https://exchange.xforce.ibmcloud.com/vulnerabilities/221507, https://github.com/python-ldap/python-ldap, https://pypi.org/project/python-ldap, https://github.com/advisories/GHSA-qfr5-wjpw-q4c4

    Affected packages

    Package

    Name: python-ldap

    Purl: pkg:pypi/python-ldap

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.4.0

    Affected versions

    2.3.13

    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
    PYSEC-2026-912 | CVE-DB