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

Q: How do I fix CVE-2025-61911?

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

Q: Is CVE-2025-61911 being exploited?

CVE-2025-61911 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-2025-61911 affect?

CVE-2025-61911 affects python-ldap. Severity is medium (CVSS 6.5). python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, the sanitization method `ldap.filter.escape_filter_chars` can be tricked to skip escaping of special characters when a crafted

Q: How urgent is CVE-2025-61911?

Priority 39/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 6.5REMOTEUPGRADE

CVE-2025-61911 is a medium-severity flaw (CVSS 6.5) 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, the sanitization method `ldap.filter.escape_filter_chars` can be tricked to skip escaping of special characters when a crafted `list` or `dict` is supplied as the `assertion_value` parameter, and the non-default `escape_mode=1` is configured. The method `ldap.filter.escape_filter_chars` supports 3 different escaping modes. `escape_mode

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-75, CWE-843
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-2025-61911?

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

Is CVE-2025-61911 being exploited?

CVE-2025-61911 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-2025-61911 affect?

CVE-2025-61911 affects python-ldap. Severity is medium (CVSS 6.5). python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, the sanitization method `ldap.filter.escape_filter_chars` can be tricked to skip escaping of special characters when a crafted

How urgent is CVE-2025-61911?

Priority 39/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

Related CVEs

CVE-2025-61912 MEDIUM 5.3 UPGRADE python-ldap is a lightweight directory access protocol (LDAP) client API for Python

References

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