JLSEC-2026-1226

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers...

JLSEC-2026-1231

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

expat: Fix of CVE-2026-56407

CVE-2026-56407: signed integer overflow in doProlog when an internal entity value longer than INTMAX XMLChars truncates ENTITY.textLen to a negative length...

libexpat: libexpat: Arbitrary code execution due to integer overflow

An integer overflow exists in libexpat's doProlog function due to improper handling of entity value lengths. A local attacker could exploit this to execute arbitrary code or access sensitive system data...

Amazon Linux 2 : expat, --advisory ALAS2-2026-3495 (ALAS-2026-3495)

The version of expat installed on the remote host is prior to 2.1.0-15. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3495 advisory. In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocatio...

Important: expat

Issue Overview: In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers. CVE-2026-56132 Affected Packages: expat Note: This advisory is applicable to...

Important: expat

Issue Overview: In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers. CVE-2026-56132 Affected Packages: expat Issue Correction: Run dnf update expat...

OESA-2026-2857 expat security update

expat is a stream-oriented XML parser library written in C. expat excels with files too large to fit RAM, and where performance and flexibility are crucial. Security Fixes: libexpat before 2.8.2 lacks handler call depth tracking for calls to XMLResumeParser from within handlers in cases of a poli...

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

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libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.

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SUSE CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

Integer Overflow or Wraparound

Overview Affected versions of this package are vulnerable to Integer Overflow or Wraparound due to improper handling of integer values in the doProlog process, specifically involving storeEntityValue and the calculation of entity textLen. An attacker can cause memory corruption or potentially...

ALPINE-CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

UBUNTU-CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen...

CVE-2026-56407

CVE-2026-56407 affects libexpat prior to 2.8.2, with an integer overflow in doProlog related to storeEntityValue and entity textLen. The NVD entries confirm the issue and describe the vulnerability as an integer overflow in doProlog. The CVE entry indicates a medium base score (CVSS 3.1: AV=L, AC...