PT-2026-107540

Name of the Vulnerable Software and Affected Versions libexpat versions prior to 2.9.0 Description A heap buffer over-read exists in the xmlparse.c file. The XML ParseBuffer function advances the parse buffer end using a caller-supplied length that is not validated against the allocated buffer...

Astra Linux – Vulnerability in Firefox and Thunderbird

In ExPat before version 2.7.2, the libexpat library allowed attackers to trigger large dynamic memory allocations through a small document that was submitted for parsing...

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

LibExpat through version 2.5.0 causes a denial of service resource consumption because multiple reparings are required when dealing with large tokens, resulting in multiple buffer fills...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, and Expat

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

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

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 – 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 – Vulnerabilities in Firefox, Thunderbird, Expat, LibXMLTok

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

AlmaLinux 9.2 [TuxCare] Security Update: expat / expat-devel / expat-static (ALMALINUX9.2:CLSA-2026:1791196479)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1791196479 advisory. - libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expatrealloc function on 32-bit platforms when computing...

ROS-20261005-73-0040

The vulnerability of the libexpat library for processing XML files is related to the inefficient algorithmic complexity in handling attribute names. Exploiting this vulnerability could allow a malicious actor to cause service failures...

FreeBSD : libexpat -- Improper Handling of Unicode Encoding (7fed71c4-be3a-11f1-ab8d-00a0980083d7)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 7fed71c4-be3a-11f1-ab8d-00a0980083d7 advisory. https://github.com/libexpat/libexpat/pull/1282 reports: Expat before 2.8.5 fails to validate that a hig...

Rocky Linux 8 [CIQ] Security Update: expat / expat-debuginfo / expat-debugsource / expat-devel Multiple Vulnerabilities (crlsa-2024_6989)

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-20246989 advisory. libexpat: Negative Length Parsing Vulnerability in libexpat CVE-2024-45490 libexpat: Integer Overflow or Wraparound CVE-2024-45491 libexpat: integer overfl...

CentOS Linux 7 [TuxCare] Security Update: python / python-debug / python-devel / python-libs / python-test / etc (CENTOS7:CLSA-2026:1781346740)

The CentOS Linux 7 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS7:CLSA-2026:1781346740 advisory. - xml.parsers.expat and xml.etree.ElementTree use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to...

Rocky Linux 9 [CIQ] Security Update: expat / expat-debuginfo / expat-debugsource / expat-devel (crlsa-2025_7444)

The Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-20257444 advisory. libexpat: expat: Improper Restriction of XML Entity Expansion Depth in libexpat CVE-2024-8176 Tenable has extracted the preceding description block directly from th...

CentOS Linux 8.4 [TuxCare] Security Update: expat / expat-devel / expat-static Multiple Vulnerabilities (CENTOS8.4:CLSA-2026:1786009371)

The CentOS Linux 8.4 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS8.4:CLSA-2026:1786009371 advisory. - libexpat before 2.8.2 lacks handler call depth tracking for calls to XMLResumeParser from within handlers in cases of a policy...

Rocky Linux 8 [CIQ] Security Update: xmlrpc-c / xmlrpc-c-c++ / xmlrpc-c-c++-debuginfo / xmlrpc-c-client / etc (crlsa-2025_4048)

The Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-20254048 advisory. libexpat: expat: Improper Restriction of XML Entity Expansion Depth in libexpat CVE-2024-8176 Tenable has extracted the preceding description block directly from th...

Rocky Linux 9 [CIQ] Security Update: expat / expat-debuginfo / expat-debugsource / expat-devel (crlsa-2025_3531)

The Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-20253531 advisory. libexpat: expat: Improper Restriction of XML Entity Expansion Depth in libexpat CVE-2024-8176 Tenable has extracted the preceding description block directly from th...

CentOS Linux 7 [TuxCare] Security Update: expat / expat-devel / expat-static (CENTOS7:CLSA-2026:1779359397)

The CentOS Linux 7 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS7:CLSA-2026:1779359397 advisory. - In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized craft...

CentOS Linux 6 [TuxCare] Security Update: expat / expat-devel (CENTOS6:CLSA-2026:1779361284)

The CentOS Linux 6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS6:CLSA-2026:1779361284 advisory. - In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized craft...

CentOS Linux 6 [TuxCare] Security Update: expat / expat-devel (CENTOS6:CLSA-2026:1786112354)

The CentOS Linux 6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS6:CLSA-2026:1786112354 advisory. - libexpat before 2.8.2 lacks handler call depth tracking for calls to XMLResumeParser from within handlers in cases of a policy violation. Thus,...

CentOS Linux 8.4 [TuxCare] Security Update: expat / expat-devel / expat-static (CENTOS8.4:CLSA-2026:1780578419)

The CentOS Linux 8.4 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS8.4:CLSA-2026:1780578419 advisory. - libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document. CVE-2026-41080 Note that Ness...