# CVE-2025-61911: python3-ldap: python-ldap is a lightweight directory access protocol (LDAP) client APIfor Python CVE-2025-61911 is fixed in 4 products on 1 platform, first by python-ldap 3.0.0-1ubuntu0.2+esm1, released October 10, 2025. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2025-61911 - Priority: Routine - CVSS: 6.5 (Medium) - EPSS: 0.0032 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 10, 2025 ## Description python-ldap is a lightweight directory access protocol (LDAP) client APIfor Python. In versions prior to 3.4.5, the sanitization method`ldap.filter.escape_filter_chars` can be tricked to skip escaping ofspecial characters when a crafted `list` or `dict` is supplied as the`assertion_value` parameter, and the non-default `escape_mode=1` isconfigured. The method `ldap.filter.escape_filter_chars` supports 3different escaping modes. `escape_mode=0` (default) and `escape_mode=2`happen to raise exceptions when a `list` or `dict` object is supplied asthe `assertion_value` parameter. However, `escape_mode=1` computes withoutperforming adequate logic to ensure a fully escaped return value. If anapplication relies on the vulnerable method in the `python-ldap` library toescape untrusted user input, an attacker might be able to abuse thevulnerability to launch ldap injection attacks which could potentiallydisclose or manipulate ldap data meant to be inaccessible to them. Version3.4.5 fixes the issue by adding a type check at the start of the`ldap.filter.escape_filter_chars` method to raise an exception when thesupplied `assertion_value` parameter is not of type `str`. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | python-ldap Debian 12.15 (bookworm) | 3.4.3-2+deb12u1 | [DEBIAN-CVE-2025-61911](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61911.md) | Oct 10, 2025 | | Linux | python-ldap Debian 13.5 (trixie) | 3.4.4-1+deb13u1 | [DEBIAN-CVE-2025-61911](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61911.md) | Oct 10, 2025 | | Linux | python-ldap Debian 14 | 3.4.5-1 | [DEBIAN-CVE-2025-61911](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61911.md) | Oct 10, 2025 | | Linux | python-ldap Ubuntu 18.04.6 LTS (bionic) | 3.0.0-1ubuntu0.2+esm1 | [python-ldap 3.0.0-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-ldap-3.0.0-1ubuntu0.2-esm1.md) | Oct 10, 2025 | | Linux | python-ldap opensuse-leap 15.6 | 3.4.0-150400.3.3.1 | [SUSE-SU-2025:3714-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-3714-1.md) | Oct 22, 2025 | | Linux | python-ldap opensuse-leap 16.0 | 3.4.4-160000.3.1 | [OPENSUSE-SU-2026:20421-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20421-1.md) | Mar 25, 2026 | | Linux | python-ldap sles 15.6 | 3.4.0-150400.3.3.1 | [SUSE-SU-2025:3714-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-3714-1.md) | Oct 22, 2025 | | Linux | python-ldap sles 16.0 | 3.4.4-160000.3.1 | [SUSE-SU-2026:20933-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20933-1.md) | Mar 25, 2026 | | Linux | python-pyldap Ubuntu 18.04.6 LTS (bionic) | 3.0.0-1ubuntu0.2+esm1 | [python-pyldap 3.0.0-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-pyldap-3.0.0-1ubuntu0.2-esm1.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 18.04.6 LTS (bionic) | 3.0.0-1ubuntu0.2+esm1 | [python3-ldap 3.0.0-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-ldap-3.0.0-1ubuntu0.2-esm1.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 20.04 LTS (focal) | 3.2.0-4ubuntu2.1+esm1 | [python3-ldap 3.2.0-4ubuntu2.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-ldap-3.2.0-4ubuntu2.1-esm1.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 22.04.1 LTS (jammy) | 3.2.0-4ubuntu7.2 | [python3-ldap 3.2.0-4ubuntu7.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-ldap-3.2.0-4ubuntu7.2.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 24.04.5 LTS (noble) | 3.4.4-1ubuntu0.24.04.1 | [python3-ldap 3.4.4-1ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-ldap-3.4.4-1ubuntu0.24.04.1.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 25.04 (plucky) | 3.4.4-1ubuntu0.25.04.1 | [python3-ldap 3.4.4-1ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-ldap-3.4.4-1ubuntu0.25.04.1.md) | Jan 16, 2026 | | Linux | python3-ldap Ubuntu 25.10 (questing) | 3.4.4-1ubuntu0.25.10.1 | [python3-ldap 3.4.4-1ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-ldap-3.4.4-1ubuntu0.25.10.1.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 18.04.6 LTS (bionic) | 3.0.0-1ubuntu0.2+esm1 | [python3-pyldap 3.0.0-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-pyldap-3.0.0-1ubuntu0.2-esm1.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 20.04 LTS (focal) | 3.2.0-4ubuntu2.1+esm1 | [python3-pyldap 3.2.0-4ubuntu2.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-pyldap-3.2.0-4ubuntu2.1-esm1.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 22.04.1 LTS (jammy) | 3.2.0-4ubuntu7.2 | [python3-pyldap 3.2.0-4ubuntu7.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-pyldap-3.2.0-4ubuntu7.2.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 24.04.5 LTS (noble) | 3.4.4-1ubuntu0.24.04.1 | [python3-pyldap 3.4.4-1ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-pyldap-3.4.4-1ubuntu0.24.04.1.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 25.04 (plucky) | 3.4.4-1ubuntu0.25.04.1 | [python3-pyldap 3.4.4-1ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-pyldap-3.4.4-1ubuntu0.25.04.1.md) | Jan 16, 2026 | | Linux | python3-pyldap Ubuntu 25.10 (questing) | 3.4.4-1ubuntu0.25.10.1 | [python3-pyldap 3.4.4-1ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-pyldap-3.4.4-1ubuntu0.25.10.1.md) | Oct 10, 2025 | --- Data as of 2026-11-10T07:50:38Z UTC. 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