`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.
History

Mon, 11 May 2026 22:30:00 +0000

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References

Mon, 11 May 2026 20:30:00 +0000

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Mon, 11 May 2026 20:00:00 +0000

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First Time appeared Python
Python cpython
Vendors & Products Python
Python cpython

Mon, 11 May 2026 18:00:00 +0000

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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.
Title The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection
Weaknesses CWE-331
References
Metrics cvssV4_0

{'score': 6.3, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: PSF

Published:

Updated: 2026-05-11T20:34:17.811Z

Reserved: 2026-04-27T14:43:40.042Z

Link: CVE-2026-7210

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-11T18:16:42.413

Modified: 2026-05-11T22:22:14.863

Link: CVE-2026-7210

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-11T20:15:09Z