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python: Python/Expat: Denial of Service via crafted XML document

🗓️ 16 Sep 2026 14:12:33Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

Remote DoS in Python xml.parsers.expat and xml.etree.ElementTree via hash-flooding on crafted XML.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Hardened Imagesanyaarch64python3.113.11.16-1.4.hum1python3.11-3.11.16-1.4.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64python3.113.11.16-1.4.hum1python3.11-3.11.16-1.4.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64python3.11-debug3.11.16-1.4.hum1python3.11-debug-3.11.16-1.4.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64python3.11-debug3.11.16-1.4.hum1python3.11-debug-3.11.16-1.4.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64python3.11-devel3.11.16-1.4.hum1python3.11-devel-3.11.16-1.4.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64python3.11-devel3.11.16-1.4.hum1python3.11-devel-3.11.16-1.4.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64python3.11-idle3.11.16-1.4.hum1python3.11-idle-3.11.16-1.4.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64python3.11-idle3.11.16-1.4.hum1python3.11-idle-3.11.16-1.4.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64python3.11-libs3.11.16-1.4.hum1python3.11-libs-3.11.16-1.4.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64python3.11-libs3.11.16-1.4.hum1python3.11-libs-3.11.16-1.4.hum1.x86_64.rpm
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21 Sep 2026 11:44Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
CVSS 46.3
EPSS0.00672
SSVC
CWE-331
PythonDoShash-floodingxml.parsers.expatremote attacker
3