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CVE-2026-7210 Details

Description

`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
http://www.openwall.com/lists/oss-security/2026/05/11/13	CVE	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/11/8	CVE	Mailing ListThird Party Advisory
https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4	[email protected]	Patch
https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566	[email protected]	Patch
https://github.com/python/cpython/commit/cbaecf9f16da611a646d507c1cbca265c588fc56	[email protected]
https://github.com/python/cpython/commit/e37df2a6a71d6538698e2d3188a7c345b827640b	[email protected]
https://github.com/python/cpython/commit/ea70712d1a8508e14e9677d44f838dab04dc0286	[email protected]
https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a	[email protected]	Patch
https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f	[email protected]	Patch
https://github.com/python/cpython/issues/149018	[email protected]	Issue Tracking
https://github.com/python/cpython/pull/149023	[email protected]	Issue TrackingPatch
https://mail.python.org/archives/list/[email protected]/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/	[email protected]	Mailing ListThird Party Advisory

see all 12 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-331	Insufficient Entropy	[email protected]

Affected Products

Product	Versions
python python	< 3.13.14 >= 3.14.0, < 3.14.6 3.15.0 alpha1 3.15.0 alpha2 3.15.0 alpha3
CPE cpe:2.3:a:python:python:::::::: cpe:2.3:a:python:python:3.15.0:alpha1:::::: cpe:2.3:a:python:python:3.15.0:alpha2:::::: cpe:2.3:a:python:python:3.15.0:alpha3:::::: cpe:2.3:a:python:python:3.15.0:alpha4:::::: cpe:2.3:a:python:python:3.15.0:alpha5:::::: cpe:2.3:a:python:python:3.15.0:alpha6:::::: cpe:2.3:a:python:python:3.15.0:alpha7:::::: cpe:2.3:a:python:python:3.15.0:alpha8:::::: cpe:2.3:a:python:python:3.15.0:beta1:::::: Remediation No remediation found in references.

Product

Versions

python python

< 3.13.14

>= 3.14.0, < 3.14.6

3.15.0 alpha1

3.15.0 alpha2

3.15.0 alpha3

CPE

cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:alpha4:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:alpha5:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:alpha6:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:alpha7:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:alpha8:*:*:*:*:*:*
cpe:2.3:a:python:python:3.15.0:beta1:*:*:*:*:*:*

Remediation

No remediation found in references.

Change History

13 change records found show changes

Date	Action	Recorded By
Aug 14, 2026	CVE Modified	[email protected]
Aug 13, 2026	CVE Modified	[email protected]
Aug 12, 2026	CVE Modified	[email protected]
Jul 27, 2026	Modified Analysis	[email protected]
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 15, 2026	Modified Analysis	[email protected]
Jun 10, 2026	CVE Modified	[email protected]
Jun 1, 2026	Reanalysis	[email protected]
May 16, 2026	Initial Analysis	[email protected]
May 11, 2026	CVE Modified	CVE
May 11, 2026	CVE Modified	CVE
May 11, 2026	New CVE Received	[email protected]