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In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.

🗓️ 11 May 2026 08:03:23Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 17 Views

Libexpat before 2.8.1 allows denial of service via crafted XML due to attribute collision checks.

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microsoftazl3_expat_2.6.4-6Range<2.8.2-1

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29 Jun 2026 21:40Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.12.9 - 7.5
EPSS0.00479
SSVC
libexpat vulnerabilitydenial of serviceattribute collision checkscrafted input
17