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Search Results (69 CVEs found)
| CVE | Vendors | Products | Updated | CVSS v3.1 |
|---|---|---|---|---|
| CVE-2021-46143 | 5 Libexpat Project, Netapp, Redhat and 2 more | 10 Libexpat, Active Iq Unified Manager, Clustered Data Ontap and 7 more | 2026-10-14 | 8.1 High |
| In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize. | ||||
| CVE-2021-45960 | 6 Debian, Libexpat Project, Netapp and 3 more | 10 Debian Linux, Libexpat, Active Iq Unified Manager and 7 more | 2026-10-14 | 8.8 High |
| In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory). | ||||
| CVE-2019-15903 | 3 Libexpat Project, Python, Redhat | 5 Libexpat, Python, Enterprise Linux and 2 more | 2026-10-14 | 6.5 Medium |
| In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read. | ||||
| CVE-2018-20843 | 8 Canonical, Debian, Fedoraproject and 5 more | 12 Ubuntu Linux, Debian Linux, Fedora and 9 more | 2026-10-14 | 7.5 High |
| In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks). | ||||
| CVE-2013-0340 | 3 Apple, Libexpat Project, Python | 7 Ipados, Iphone Os, Macos and 4 more | 2026-10-14 | N/A |
| expat 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 HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE. | ||||
| CVE-2017-9233 | 3 Debian, Libexpat Project, Python | 3 Debian Linux, Libexpat, Python | 2026-10-08 | 7.5 High |
| XML 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-2016-4472 | 4 Canonical, Libexpat Project, Mcafee and 1 more | 4 Ubuntu Linux, Libexpat, Policy Auditor and 1 more | 2026-10-08 | 8.1 High |
| 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. | ||||
| CVE-2016-0718 | 10 Apple, Canonical, Debian and 7 more | 16 Mac Os X, Ubuntu Linux, Debian Linux and 13 more | 2026-10-08 | 9.8 Critical |
| Expat 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-2026-76641 | 2 Libexpat, Libexpat Project | 2 Expat, Libexpat | 2026-10-01 | 7.5 High |
| Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046. | ||||
| CVE-2026-102633 | 2 Libexpat, Libexpat Project | 2 Expat, Libexpat | 2026-09-30 | 5.9 Medium |
| libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap buffer overflow, memory corruption, or denial of service. | ||||
| CVE-2026-93990 | 2 Libexpat, Libexpat Project | 2 Expat, Libexpat | 2026-09-28 | 7.5 High |
| Expat before 2.8.5 fails to validate that a high surrogate in UTF-16 input is followed by a low surrogate, allowing malformed UTF-16 sequences to be accepted. Attackers can supply UTF-16 encoded XML containing lone high surrogates that consume the following code unit, causing Expat to pass unpaired surrogates to applications built with XML_UNICODE and to silently replace input characters in other builds. | ||||
| CVE-2026-66046 | 1 Libexpat Project | 1 Libexpat | 2026-09-18 | 7.5 High |
| Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options. | ||||
| CVE-2026-45186 | 1 Libexpat Project | 1 Libexpat | 2026-08-25 | 2.9 Low |
| 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. | ||||
| CVE-2026-76956 | 1 Libexpat Project | 1 Libexpat | 2026-08-20 | 5.9 Medium |
| In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content. | ||||
| CVE-2026-76957 | 1 Libexpat Project | 1 Libexpat | 2026-08-20 | 4.9 Medium |
| libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412. | ||||
| CVE-2026-72522 | 1 Libexpat Project | 1 Libexpat | 2026-08-13 | 6.2 Medium |
| libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions. | ||||
| CVE-2026-56403 | 1 Libexpat Project | 1 Libexpat | 2026-06-22 | 6.9 Medium |
| libexpat before 2.8.2 has an integer overflow in storeAtts. | ||||
| CVE-2026-56404 | 1 Libexpat Project | 1 Libexpat | 2026-06-22 | 6.9 Medium |
| libexpat before 2.8.2 has an integer overflow in addBinding. | ||||
| CVE-2026-56405 | 1 Libexpat Project | 1 Libexpat | 2026-06-22 | 6.9 Medium |
| libexpat before 2.8.2 has an integer overflow in getAttributeId. | ||||
| CVE-2026-56406 | 1 Libexpat Project | 1 Libexpat | 2026-06-22 | 6.9 Medium |
| libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse. | ||||