Medium 5.5Published Oct 10, 2025

CVE-2025-61912python-ldap Vulnerable to Improper Encoding or Escaping of Output and Improper Null Termination

Updated under an hour ago (Oct 28, 2026, 6:10 AM ET)

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Every CVE for python-ldap

Exploited in the last 30 days

python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, ldap.dn.escape_dn_chars() escapes \x00 incorrectly by emitting a backslash followed by a literal NUL byte instead of the RFC-4514 hex form \00. Any application that uses this helper to construct DNs from untrusted input can be made to consistently fail before a request is sent to the LDAP server (e.g., AD), resulting in a client-side denial of service. Version 3.4.5 contains a patch for the issue.

CVSS: 5.5 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Weakness (CWE): CWE-116, CWE-170
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 14, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

python-ldap python-ldap python_ldap:python_ldap (from the name)	before 3.4.5	CNA record
python-ldap python-ldap python-ldap:python-ldap	before 3.4.5	NVD

References

References

https://github.com/python-ldap/python-ldap/security/advisories/GHSA-p34h-wq7j-h5v6	x-refsource-confirm, exploit, third-party-advisory
https://github.com/python-ldap/python-ldap/commit/6ea80326a34ee6093219628d7690bced50c49a3f	x-refsource-misc, patch
https://github.com/python-ldap/python-ldap/releases/tag/python-ldap-3.4.5	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.