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lxml: Default configuration of iterparse() and ETCompatXMLParser() allows XXE to local files

🗓️ 26 Apr 2026 08:04:41Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 1 Views

The default iterparse and ETCompatXMLParser in lxml allow local file External Entity vulnerabilities.

Related
Detection
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - Visual Inspection component uses lxml-6.0.0-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl which is vulnerable to CVE-2026-41066
1 Jun 202607:56
–ibm
IBM Security Bulletins		Security Bulletin: IBM InfoSphere Optim Archive Viewer is affected by a vulnerability in lxml (CVE-2026-41066)
31 May 202616:48
–ibm
IBM Security Bulletins		Security Bulletin: Multiple security vulnerabilities are addressed with IBM Process Mining Interim Fix for May 2026
29 May 202610:53
–ibm
ATTACKERKB		CVE-2026-41066
24 Apr 202616:45
–attackerkb
Tenable Nessus		Amazon Linux 2023 : python3-lxml (ALAS2023-2026-1678)
20 May 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : python3.13-lxml (ALAS2023-2026-1679)
20 May 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : python-lxml, --advisory ALAS2-2026-3297 (ALAS-2026-3297)
14 May 202600:00
–nessus
Tenable Nessus		Azure Linux 3.0 Security Update: CBL-Mariner Releases (CVE-2026-41066)
6 May 202600:00
–nessus
Tenable Nessus		SUSE SLES16 Security Update : python-lxml (SUSE-SU-2026:21603-1)
16 May 202600:00
–nessus
Tenable Nessus		TencentOS Server 4: python-lxml (TSSA-2026:0288)
14 May 202600:00
–nessus
Rows per page
Vulners
Node
microsoftazl3_python-lxml_4.9.3-2Range<4.9.3-2
OR
microsoftazl3_python-lxml_4.9.3-1Range<4.9.3-2

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06 May 2026 21:42Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
EPSS0.0006
SSVC
lxmliterparseETCompatXMLParserExternal EntityLocal file
1