CVE-2026-32777Medium· 4.0▾ Sunlitlibexpat before 2.7.5 allows an infinite loop while parsing DTD content.
▾ Sunlit zone — Low / medium · no exploitation signal
impact 22 · likelihood 0 · 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. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
libexpat before 2.7.5 allows an infinite loop while parsing DTD content.
libexpat < 2.7.5Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-32776Medium· 4.0libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content.
CVE-2026-32778Low· 2.9libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier ouf-of-memory condition.
CVE-2017-9233High· 7.5XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
CVE-2026-118370Medium· 5.9libexpat through 2.9.0 Integer Overflow in storeAtts via attIndex and nPrefixes
CVE-2026-117610Medium· 5.9libexpat through 2.9.0 NULL Pointer Dereference via External Entity Subparser
CVE-2026-115506High· 7.5libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay