CVE-2026-7210
It was discovered that Python did not use sufficient entropy for Expat hash-flooding protection in the xml.parsers.expat and xml.etree.ElementTree modules. An attacker could use this to cause a denial of service via a crafted XML document.
CSIRTS triage
- What
- Insufficient entropy for Expat hash-flooding protection could lead to denial of service via crafted XML documents.
- Who is affected
- Users of Python are affected by this vulnerability.
- Urgency
- Remediation is necessary due to the potential for denial of service attacks.
- Action
- Users should apply the necessary updates to Python.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.79% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all EPSS-scored CVEs.
Advisory coverage (2)
- low[UPDATE] [low] CPython: Vulnerability allows Denial of Servicecert-bund · 2026-07-10
- unknownUSN-8524-1: Python vulnerabilityubuntu · 2026-07-09
External references
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