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In libxml2 2.11 before 2.11.9, 2.12 before 2.12.9, and 2.13 before 2.13.3, the SAX parser can produce events for external entities even if custom SAX handlers try to override entity content (by setting "checked"). This makes classic XXE attacks possible.

🗓️ 28 Dec 2024 08:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 3 Views

Libxml2 SAX can emit external entity events despite custom handlers, enabling XXE.

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18 Feb 2026 22:59Current
6.8Medium risk
Vulners AI Score6.8
CVSS 3.19.1
EPSS0.01172
SSVC
3