CVE-2016-4472High· 8.1▾ TwilightThe overflow protection in Expat is removed by compilers with certain optimization settings, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted XML data. NOTE: this vulnerab…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 2.4 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
12%
The overflow protection in Expat is removed by compilers with certain optimization settings, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted XML data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1283 and CVE-2015-2716.
libexpat <= 2.1.1ubuntu_linux = 12.04policy_auditor < 6.5.1python >= 2.7.0, < 2.7.15python >= 3.3.0, < 3.3.7python >= 3.4.0, < 3.4.7python >= 3.5.0, < 3.5.4python >= 3.6.0, < 3.6.2Upgrade past the affected range:
policy_auditor 6.5.1python 3.6.2Connected by shared product, vendor, weakness, or advisory.
CVE-2013-0340Medium· 6.8expat before version 2.4.0 does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HT…
CVE-2016-0718Critical· 9.8Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow.
CVE-2026-115506High· 7.5libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay
CVE-2026-113351Medium· 5.9libexpat 2.7.2 through 2.9.0 Denial of Service via XML_ParserReset
CVE-2025-59375High· 7.5libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
CVE-2025-66382Low· 2.9In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.