Sicherheitslücken in libxmltok · Seite 2

CVE-2026-56404

libexpat before 2.8.2 has an integer overflow in addBinding.

• Auf 1.2-4ubuntu0.18.04.1~esm7 aktualisieren

CVE-2026-56403

libexpat before 2.8.2 has an integer overflow in storeAtts.

CVE-2026-56131

libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation).

CVE-2026-50219

libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,

CVE-2026-45186

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-2026-41080

libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.

CVE-2026-32778

libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier ouf-of-memory condition.

CVE-2026-32777

libexpat before 2.7.5 allows an infinite loop while parsing DTD content.

CVE-2026-32776

libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content.

CVE-2026-25210

In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.

• Auf 1.2-4ubuntu0.18.04.1~esm6 aktualisieren

CVE-2026-24515

In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.

• Auf 1.2-4ubuntu0.18.04.1~esm6 aktualisieren

CVE-2025-66382

In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.

CVE-2025-59375

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

Libexpat: expat: improper restriction of xml entity expansion depth in libexpat

A stack overflow vulnerability exists in the libexpat library due to the way it handles recursive entity expansion in XML documents. When parsing an XML document with deeply nested entity references, libexpat can be forced to recurse indefinitely, exhausting the stack space and causing a crash. This issue could lead to denial of service (DoS) or, in some cases, exploitable memory corruption, depending on the environment and library usage.

CVE-2024-45491

An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).

• Auf 1.2-4ubuntu0.18.04.1~esm3 aktualisieren

CVE-2024-45490

An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.

• Auf 1.2-4ubuntu0.18.04.1~esm3 aktualisieren

CVE-2024-28757

libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).

CVE-2023-52425

libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.

CVE-2022-25235

xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.

• Auf 1.2-4ubuntu0.18.04.1~esm1 aktualisieren

CVE-2022-25236

xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs.

• Auf 1.2-4ubuntu0.18.04.1~esm1 aktualisieren