CVE-2026-7210

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-7210
`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.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/python/cpython/issues/149018 Issue Tracking
https://github.com/python/cpython/pull/149023 Issue Tracking Patch
https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/ Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/11/13 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/11/8 Mailing List Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
History

01 Jun 2026, 14:32

Type Values Removed Values Added
CPE cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
First Time Python python
Python

16 May 2026, 03:05

Type Values Removed Values Added
References () https://github.com/python/cpython/issues/149018 - () https://github.com/python/cpython/issues/149018 - Issue Tracking
References () https://github.com/python/cpython/pull/149023 - () https://github.com/python/cpython/pull/149023 - Issue Tracking, Patch
References () https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/ - () https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/ - Mailing List, Third Party Advisory
References () http://www.openwall.com/lists/oss-security/2026/05/11/13 - () http://www.openwall.com/lists/oss-security/2026/05/11/13 - Mailing List, Third Party Advisory
References () http://www.openwall.com/lists/oss-security/2026/05/11/8 - () http://www.openwall.com/lists/oss-security/2026/05/11/8 - Mailing List, Third Party Advisory
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8
First Time Libexpat Project
Libexpat Project libexpat
CPE cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*

11 May 2026, 22:22

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/05/11/13 -

11 May 2026, 20:25

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/05/11/8 -

11 May 2026, 18:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-11 18:16

Updated : 2026-06-01 14:32

NVD link : CVE-2026-7210

Mitre link : CVE-2026-7210

CVE.ORG link : CVE-2026-7210

JSON object : View

Products Affected

python

  • python
CWE
CWE-331

Insufficient Entropy