> CVE-2026-49825 [HIGH]

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PUBLISHED
2026-08-20 15:17
MODIFIED
2026-08-20 15:17
CVSS_SCORE V3
8.2
EPSS (Prob. Exploit)
0.30%
Top 78.7%
DATA SOURCES:
NVD đź”— 2026-08-20 CWE MITRE đź”— 2026-09-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-10-29 OSV đź”— 2026-08-26 MSRC đź”— 2026-09-01

> DESCRIPTION

lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.1, link attributes in ``lxml.html.defs.link_attrs`` were missing ``xlink:href``, which can be used for URL bypass attacks in embedded SVG/MathML/etc. content. This vulnerability was fixed in lxml 6.1.1 and lxml_html_clean 0.4.5.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
EXPLOITABILITY
2.8
IMPACT
4.7

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
Required (R)
NĂ©cessite une action utilisateur (clic lien, ouverture fichier, etc.)
S (Périmètre)
Scope
Changed (C)
Impact s'Ă©tend au-delĂ  du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-79 CWE-184

> CWE DETAILED DESCRIPTIONS

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') - The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. | CWE-184: Incomplete List of Disallowed Inputs - The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring Syst...
Red Hat Security Advisory: python3.12-lxml security update
An update for python3.12-lxml is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring...
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common...
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important....
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important....
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring Syst...
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Container Release Update
An update is now available for Red Hat Ansible Automation Platform 2.5
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Container Release Update
An update is now available for Red Hat Ansible Automation Platform 2.5
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
An update is now available for Red Hat Ansible Automation Platform 2.6
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.7 Container Release Update
An update is now available for Red Hat Ansible Automation Platform 2.7
Red Hat Security Advisory: python3.12-lxml security update
An update for python3.12-lxml is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Com...
Red Hat Security Advisory: python3.12-lxml security update
An update for python3.12-lxml is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Import...
Red Hat Security Advisory: Red Hat Quay 3.17.5
Red Hat Quay 3.17.5 is now available with bug fixes.
Red Hat Security Advisory: Satellite 6.16.14 Async Update
An update is now available for Red Hat Satellite 6.16 for RHEL 8 and RHEL 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring Sy...
Red Hat Security Advisory: Satellite 6.17.12 Async Update
An update is now available for Red Hat Satellite 6.17 for RHEL 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS)...
Red Hat Security Advisory: Red Hat Quay 3.9.27
Red Hat Quay 3.9.27 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.12.23
Red Hat Quay 3.12.23 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.10.27
Red Hat Quay 3.10.27 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay
A new version of Red Hat Quay is now available.
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Secur...
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red Hat...
Red Hat Security Advisory: RHOAI 3.4.5 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: RHOAI 2.25.12 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: RHOAI 3.5.2 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common...
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat...
Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION. Red Hat Product Security has rated this update as having a security impact of Import...

> GITHUB SECURITY ADVISORY

GHSA-4jhm-jv67-739f HIGH

`lxml_html_clean.Cleaner` does not strip `javascript:` URLs from namespaced URL attributes

AFFECTED PACKAGES:
PIP / lxml_html_clean
< 0.4.5
Fixed in: 0.4.5

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

lxml: javascript: URL bypass in Cleaner via xlink:href

AFFECTED PACKAGES:
Unknown / Unknown
118 versions affected
ALIASES:
GHSA-4jhm-jv67-739f, PYSEC-2026-2614

> HISTORIQUE DES MODIFICATIONS

Première apparition
20/08/2026 15:17
Source: NVD
đź“Š ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') - The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in...
Total des modifications: 1 Dernière mise à jour: 1 month ago

> REFERENCES

https://github.com/fedora-python/lxml_html_clean/commit/322357ac61c6cf80fcbaba53...
https://github.com/fedora-python/lxml_html_clean/releases/tag/0.4.5
https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-4jhm-j...
https://github.com/lxml/lxml/commit/5927a6d5e851845140975d99b65461e255caaab0
https://github.com/lxml/lxml/releases/tag/lxml-6.1.1
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