https://seclists.org/oss-sec/2026/q2/478: [oss-security][CVE-2026-7210] Cpython: The expat and elementte parsers use insufficient entropy for XML hash-flooding protection

Published May 11, 2026
·
Updated

Affected Software

2 affected components
Python CPython
Expat libexpat<2.8.0
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Frequently Asked Questions

1

What is the severity of CVE-2026-7210?

CVE-2026-7210 is classified as a medium severity vulnerability due to insufficient entropy in XML hash-flooding protection.

2

How do I fix CVE-2026-7210?

To fix CVE-2026-7210, update to a patched version of Python CPython or the affected Expat libraries.

3

What is the impact of CVE-2026-7210?

CVE-2026-7210 could potentially allow attackers to exploit the hash-flooding vulnerability through crafted XML inputs.

4

Which versions of Python are affected by CVE-2026-7210?

CVE-2026-7210 impacts multiple versions of Python that utilize the expat and elementtree parsers.

5

Is CVE-2026-7210 exploitable remotely?

Yes, CVE-2026-7210 can be exploited remotely, making it a significant risk for applications processing untrusted XML data.

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