← Vulnerability feed

Vulnerability record · CVE-2026-7210 · published 11 May 2026

CVE-2026-7210: Python vulnerability

Python · Python

`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.

6.3 CVSS 4.0 Medium EPSS 0.67% · top 47.4% CWE-331 · CWE-331
6.3CVSS 4.0 base score
0.67%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
26 Oct 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4 Patch
https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566 Patch
https://github.com/python/cpython/commit/cbaecf9f16da611a646d507c1cbca265c588fc56
https://github.com/python/cpython/commit/e37df2a6a71d6538698e2d3188a7c345b827640b
https://github.com/python/cpython/commit/ea70712d1a8508e14e9677d44f838dab04dc0286
https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a Patch
https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f Patch
https://github.com/python/cpython/issues/149018 Issue Tracking
https://github.com/python/cpython/pull/149023 Issue TrackingPatch
https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/ Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/11/13 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/11/8 Mailing ListThird Party Advisory

Track CVE-2026-7210 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2008-5031Python vulnerabilityMultiple integer overflows in Python 2.2.3 through 2.5.1, and 2.6, allow context-dependent attackers to have an unknown impact via a large integer va…EPSS 3.0%9.8CVE-2022-48565Python xml external entity (xxe) vulnerabilityAn XML External Entity (XXE) issue was discovered in Python through 3.9.1. The plistlib module no longer accepts entity declarations in XML plist fil…EPSS 5.2%9.8CVE-2022-37454Extended keccak code package project extended keccak code package integer overflow vulnerabilityThe Keccak XKCP SHA-3 reference implementation before fdc6fef has an integer overflow and resultant buffer overflow that allows attackers to execute …EPSS 7.4%9.8CVE-2021-29921Python vulnerabilityIn Python before 3,9,5, the ipaddress library mishandles leading zero characters in the octets of an IP address string. This (in some situations) all…EPSS 6.8%9.8CVE-2021-3177Python classic buffer overflow vulnerabilityPython 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applic…EPSS 24%9.8CVE-2020-27619Python vulnerabilityIn Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec tests call eval() on content retrieved via HTTP.EPSS 8.3%9.8CVE-2020-15801Python untrusted search path vulnerabilityIn Python 3.8.4, sys.path restrictions specified in a python38._pth file are ignored, allowing code to be loaded from arbitrary locations. The <execu…EPSS 3.6%9.8CVE-2014-4650Python path traversal vulnerabilityThe CGIHTTPServer module in Python 2.7.5 and 3.3.4 does not properly handle URLs in which URL encoding is used for path separators, which allows remo…EPSS 24%

Source: NIST National Vulnerability Database (record CVE-2026-7210), CISA KEV, FIRST EPSS (scores of 2026-11-13). This page is refreshed as NVD updates the record.