Vulnerability DatabaseCVE-2026-7210
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CVE-2026-7210
Published:May 11, 2026
Updated:May 16, 2026
"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.
Related Resources (5)
https://github.com/python/cpython/pull/149023
http://www.openwall.com/lists/oss-security/2026/05/11/13
http://www.openwall.com/lists/oss-security/2026/05/11/8
https://github.com/python/cpython/issues/149018
https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/
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CVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Insufficient Entropy
CWE-331
EPSS
Base Score:
0.05