CVE-2026-41066

Publication date 24 April 2026

Last updated 8 October 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
lxml 26.04 LTS resolute
Fixed 6.0.2-1ubuntu0.1
25.10 questing Ignored end of life, was needed
24.04 LTS noble
Fixed 5.2.1-1ubuntu0.2
22.04 LTS jammy
Fixed 4.8.0-1ubuntu0.1
20.04 LTS focal
Fixed 4.5.0-1ubuntu0.5+esm1
18.04 LTS bionic
Fixed 4.2.1-1ubuntu0.6+esm1
16.04 LTS xenial
Fixed 3.5.0-1ubuntu0.4+esm3
14.04 LTS trusty
Fixed 3.3.3-1ubuntu0.2+esm6

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro 30-day free trial

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
lxml

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

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

References

Related Ubuntu Security Notices (USN)

Other references

Access our resources on patching vulnerabilities