Is CVE-2026-41066 actively exploited?

CVE-2026-41066 has no public evidence of in-the-wild exploitation as of 2026-04-27.

What is the CVSS score for CVE-2026-41066?

CVE-2026-41066 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

How do I patch CVE-2026-41066?

Patch guidance is available from lxml security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-41066.

Fix CVE-2026-41066 - HIGH lxml lxml

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none
Weaknesses: CWE-611 · XML External Entity (XXE)

Metadata

Primary Vendor: LXML
Published: 4/24/2026
Last Modified: 4/27/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-41066

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary