Home/CVE/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
CVE

CVE-2026-41066

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

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.

HIGH · CVSS 7.5 EPSS 0.00044
Act now
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-611Improper Restriction of XML External Entity Reference
▤

Affected Products & Versions

1
lxml< 6.1.0
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI lxml HIGH fixed in 6.1.0
⚠

Public Exploits & PoCs

1
pocbugs.launchpad.net · 2146291bugs.launchpad.net
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD24 Apr 2026 · 05:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

5
suse-csafopenSUSE-SU-2026:20737-1
suse-csafSUSE-SU-2026:21587-1
suse-csafSUSE-SU-2026:21603-1
msrcCVE-2026-41066
suse-csafopenSUSE-SU-2026:10596-1
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/lxml/lxml/security/advisories/GHSA-vfmq-68hx-4jfwMitigationVendor Advisory
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