Vulnerability in Libexpat_project Libexpat
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 li…
EPSS: 0.008 (52.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Libexpat_project Libexpat
- Python
- Python Software Foundation Cpython — versions 3.14.0, 0, 3.15.0a1
Weakness classification (CWE)
References
- cna@python.org (vendor-advisory, Mailing List, Third Party Advisory)
- cna@python.org (Patch, patch, Issue Tracking)
- cna@python.org (issue-tracking, Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
Frequently asked questions
- What is CVE-2026-7210?
- CVE-2026-7210 is a high-severity vulnerability in Libexpat_project Libexpat, classified under Insufficient Entropy. CVSS score: 7.5/10. Published 2026-05-11.
- How severe is CVE-2026-7210?
- High severity. CVSS v3 base score is 7.5 out of 10.