Astra Linux – Vulnerabilities in Firefox, Thunderbird, and Expat

The issue with integer overflow occurs in storeAtts in the xmlparse.c file, within the Expat library also known as libexpat, before version 2.4.3...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, Expat, LibXMLTok

In xmlparse.c within Expat also known as libexpat, prior to version 2.4.5, attackers could insert namespace-separator characters into namespace URIs...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, and Expat

In Expat also known as libexpat, before version 2.4.5, there is an integer overflow in storeRawNames...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, and Expat

The buildmodel function in xmlparse.c within ExPat also known as libexpat has an integer overflow issue before version 2.4.3...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, and Expat

The defineAttribute function in xmlparse.c of Expat also known as libexpat has an integer overflow before version 2.4.3...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, and Expat

The nextScaffoldPart function in xmlparse.c of Expat also known as libexpat, prior to version 2.4.3, has an integer overflow issue...

Astra Linux – Vulnerability in Firefox, expat, libxmltok, Thunderbird

The libexpat library before version 2.4.9 has a use-after-free issue in the doContent function of the xmlparse.c file...

Astra Linux – Vulnerability in libxmltok

In libexpat before version 2.2.8, crafted XML inputs could trick the parser into switching from DTD parsing to document parsing too early. A consecutive call to XMLGetCurrentLineNumber or XMLGetCurrentColumnNumber would then lead to a heap-based buffer overflow...

Fedora 43 : expat (2026-89f45c355d)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-89f45c355d advisory. Rebase to version 2.8.1 Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not tested for...

Fedora 44 : expat (2026-4ef690dc30)

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-4ef690dc30 advisory. Rebase to version 2.8.1 Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not tested for...

Fedora 44 : mingw-expat (2026-163d1fe6c0)

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-163d1fe6c0 advisory. Update to expat-2.8.1. Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not tested for...

Fedora 43 : mingw-expat (2026-9cf92027ec)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-9cf92027ec advisory. Update to expat-2.8.1. Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not tested for...

Important Photon OS Security Update - PHSA-2026-4.0-1022

Updates of 'strongswan', 'expat' packages of Photon OS have been released...

cpython: Stack overflow parsing XML with deeply nested DTD content models

A stack overflow flaw has been discovered in the python pyexpat module. When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs. This will result in a program crash...

Important: Red Hat Security Advisory: python3.12 security update

An update for python3.12 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability fro...

CLSA-2026-1779213441 python3.11: Fix of 11 CVEs

CVE-2026-4224: avoid unbound C recursion in convcontentmodel in pyexpat - CVE-2026-3644: reject control characters in http.cookies.Morsel.update - CVE-2026-0672: reject control characters in http.cookies.Morsel - CVE-2025-8291: check consistency of zip64 end of central directory record -...

cpython: Stack overflow parsing XML with deeply nested DTD content models

A stack overflow flaw has been discovered in the python pyexpat module. When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs. This will result in a program crash...

CLSA-2026-1779184141 expat: Fix of CVE-2026-45186

CVE-2026-45186: fix quadratic complexity in attribute name collision check...

CLSA-2026-1779183482 Fix CVE(s): CVE-2026-45186

SECURITY UPDATE: denial of service via On^2 attribute name collision check with moderately sized crafted XML input - debian/patches/CVE-2026-45186.patch: replace linear scan in defineAttribute with O1 hash table lookup using new ELEMENTTYPE.defaultAttsNames field in expat/lib/xmlparse.c -...

Important: python3.12 security update

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fixes:...