CVE-2026-41066

Name: CVE-2026-41066
Creator: NVD / NIST
Published: 2026-04-24T17:16:20.933+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2026-41066 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files. Setting the resolve_entities option explicitly to resolve_entities='internal' or resolve_entities=False disables the local file access. This vulnerability is fixed in 6.1.0.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.32%

24.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
Lxml	Lxml	< 6.1.0

References

https://bugs.launchpad.net/lxml/+bug/2146291Exploit, Issue Tracking, Third Party Advisory
https://github.com/lxml/lxml/security/advisories/GHSA-vfmq-68hx-4jfwMitigation, Vendor Advisory

Timeline

Published: Apr 24, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-41066?

How severe is CVE-2026-41066?

CVE-2026-41066 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2026-41066?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-41066?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST