CVE-2025-61912: python-ldap is a lightweight directory access protocol (LDAP) client API for Python

Q: How do I fix CVE-2025-61912?

python-ldap: upgrade to 3.4.5. Exact commands for each OS are on this page.

Q: Is CVE-2025-61912 being exploited?

CVE-2025-61912 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-61912 affect?

CVE-2025-61912 affects python-ldap. Severity is medium (CVSS 5.3). 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-45

Q: How urgent is CVE-2025-61912?

Priority 38/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2025-61912 is a medium-severity flaw (CVSS 5.3) affecting python-ldap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 d

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-116, CWE-170
Published	2025-10-10
Last modified	2026-10-19

Publisher (CNA): GitHub, Inc. · Vendor: python-ldap

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-10 22:15 UTCPublished CVE record published
2026-10-19 16:10 UTCUpdated Record last modified

python-ldap python-ldap UPGRADE

Affected: < 3.4.5

Fixed in: 3.4.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy python-ldap || rpm -q python-ldap || python-ldap --version

2. UPGRADE to 3.4.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade python-ldap

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade python-ldap

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-61912?

python-ldap: upgrade to 3.4.5. Exact commands for each OS are on this page.

Is CVE-2025-61912 being exploited?

CVE-2025-61912 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-61912 affect?

CVE-2025-61912 affects python-ldap. Severity is medium (CVSS 5.3). 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-45

How urgent is CVE-2025-61912?

Priority 38/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

Related CVEs

CVE-2025-61911 MEDIUM 6.5 UPGRADE python-ldap is a lightweight directory access protocol (LDAP) client API for Python

References

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