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CVE-2004-0110

libxml2 long URL causes SEGV

Buffer overflow in the (1) nanohttp or (2) nanoftp modules in XMLSoft Libxml 2 (Libxml2) 2.6.0 through 2.6.5 allow remote attackers to execute arbitrary code via a long URL.

CVSS 2.0 · 7.5 High EPSS 24.2% KEV · Not listed
Vendors
Redhat Sgi Xmlsoft
Products
Enterprise Linux Linux Propack and 2 more
CVE-2025-24928

libxml2: Stack-based buffer overflow in xmlSnprintfElements of libxml2

libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a stack-based buffer overflow in xmlSnprintfElements in valid.c. To exploit this, DTD validation must occur for an untrusted document or untrusted DTD. NOTE: this is similar to CVE-2017-9047.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Netapp Redhat Xmlsoft
Products
Active Iq Unified Manager H300s H300s Firmware and 25 more
CVE-2016-1762

libxml2: Heap-based buffer-overread in xmlNextChar

The xmlNextChar function in libxml2 before 2.9.4 allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted XML document.

CVSS 3.1 · 8.1 High EPSS 6.1% KEV · Not listed
Vendors
Apple Canonical Debian and 3 more
Products
Iphone Os Mac Os X Safari and 14 more
CVE-2016-1834

libxml2: Heap-buffer-overflow in xmlStrncat

Heap-based buffer overflow in the xmlStrncat function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted XML document.

CVSS 3.1 · 7.8 High EPSS 4.6% KEV · Not listed
Vendors
Apple Canonical Debian and 3 more
Products
Iphone Os Mac Os X Tvos and 13 more
CVE-2016-3627

libxml2: stack exhaustion while parsing xml files in recovery mode

The xmlStringGetNodeList function in tree.c in libxml2 2.9.3 and earlier, when used in recovery mode, allows context-dependent attackers to cause a denial of service (infinite recursion, stack consumption, and application crash) via a crafted XML document.

CVSS 3.1 · 7.5 High EPSS 7.0% KEV · Not listed
Vendors
Canonical Debian Hp and 4 more
Products
Ubuntu Linux Debian Linux Icewall Federation Agent and 12 more
CVE-2017-5130

chromium-browser: heap overflow in libxml2

An integer overflow in xmlmemory.c in libxml2 before 2.9.5, as used in Google Chrome prior to 62.0.3202.62 and other products, allowed a remote attacker to potentially exploit heap corruption via a crafted XML file.

CVSS 3.1 · 8.8 High EPSS 2.7% KEV · Not listed
Vendors
Debian Google Redhat and 1 more
Products
Debian Linux Chrome Rhel Extras and 1 more
CVE-2024-40896

libxml2: XXE vulnerability

In libxml2 2.11 before 2.11.9, 2.12 before 2.12.9, and 2.13 before 2.13.3, the SAX parser can produce events for external entities even if custom SAX handlers try to override entity content (by setting "checked"). This makes classic XXE attacks possible.

CVSS 3.1 · 9.1 Critical EPSS 1.2% KEV · Not listed
Vendors
Netapp Redhat Xmlsoft
Products
H300s H300s Firmware H410c and 12 more
CVE-2022-2309

NULL Pointer Dereference in lxml/lxml

NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.

CVSS 3.1 · 7.5 High EPSS 2.4% KEV · Not listed
Vendors
Fedoraproject Lxml Redhat and 1 more
Products
Fedora Lxml Enterprise Linux and 1 more
CVE-2024-56171

libxml2: Use-After-Free in libxml2

libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a use-after-free in xmlSchemaIDCFillNodeTables and xmlSchemaBubbleIDCNodeTables in xmlschemas.c. To exploit this, a crafted XML document must be validated against an XML schema with certain identity constraints, or a crafted XML schema must be used.

CVSS 3.1 · 7.8 High EPSS 1.2% KEV · Not listed
Vendors
Netapp Redhat Xmlsoft
Products
Active Iq Unified Manager H300s H300s Firmware and 25 more
CVE-2025-32414

libxml2: Out-of-Bounds Read in libxml2

In libxml2 before 2.13.8 and 2.14.x before 2.14.2, out-of-bounds memory access can occur in the Python API (Python bindings) because of an incorrect return value. This occurs in xmlPythonFileRead and xmlPythonFileReadRaw because of a difference between bytes and characters.

CVSS 3.1 · 5.6 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat Xmlsoft
Products
Enterprise Linux Libxml2
CVE-2016-4483

libxml2: out-of-bounds read

The xmlBufAttrSerializeTxtContent function in xmlsave.c in libxml2 allows context-dependent attackers to cause a denial of service (out-of-bounds read and application crash) via a non-UTF-8 attribute value, related to serialization. NOTE: this vulnerability may be a duplicate of CVE-2016-3627.

CVSS 3.1 · 7.5 High EPSS 6.0% KEV · Not listed
Vendors
Debian Oracle Redhat and 1 more
Products
Debian Linux Solaris Jboss Core Services and 1 more
CVE-2015-7498

libxml2: Heap-based buffer overflow in xmlParseXmlDecl

Heap-based buffer overflow in the xmlParseXmlDecl function in parser.c in libxml2 before 2.9.3 allows context-dependent attackers to cause a denial of service via unspecified vectors related to extracting errors after an encoding conversion failure.

CVSS 2.0 · 5.0 Medium EPSS 7.2% KEV · Not listed
Vendors
Canonical Debian Hp and 2 more
Products
Ubuntu Linux Debian Linux Icewall Federation Agent and 8 more
CVE-2015-7497

libxml2: Heap-based buffer overflow in xmlDictComputeFastQKey

Heap-based buffer overflow in the xmlDictComputeFastQKey function in dict.c in libxml2 before 2.9.3 allows context-dependent attackers to cause a denial of service via unspecified vectors.

CVSS 2.0 · 5.0 Medium EPSS 7.2% KEV · Not listed
Vendors
Canonical Debian Hp and 2 more
Products
Ubuntu Linux Debian Linux Icewall Federation Agent and 8 more
CVE-2015-6838

php: NULL pointer dereference in XSLTProcessor class

The xsl_ext_function_php function in ext/xsl/xsltprocessor.c in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13, when libxml2 before 2.9.2 is used, does not consider the possibility of a NULL valuePop return value before proceeding with a free operation after the principal argument loop, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted XML document, a different vulnerability than CVE-2015-6837.

CVSS 3.0 · 7.5 High EPSS 8.1% KEV · Not listed
Vendors
Php Redhat Xmlsoft
Products
Php Rhel Software Collections Libxml2
CVE-2015-6837

php: NULL pointer dereference in XSLTProcessor class

The xsl_ext_function_php function in ext/xsl/xsltprocessor.c in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13, when libxml2 before 2.9.2 is used, does not consider the possibility of a NULL valuePop return value before proceeding with a free operation during initial error checking, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted XML document, a different vulnerability than CVE-2015-6838.

CVSS 3.0 · 7.5 High EPSS 7.3% KEV · Not listed
Vendors
Php Redhat Xmlsoft
Products
Php Rhel Software Collections Libxml2
CVE-2016-1836

libxml2: Heap use-after-free in xmlDictComputeFastKey

Use-after-free vulnerability in the xmlDictComputeFastKey function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service via a crafted XML document.

CVSS 3.0 · 5.5 Medium EPSS 4.3% KEV · Not listed
Vendors
Apple Canonical Debian and 3 more
Products
Iphone Os Mac Os X Tvos and 13 more
CVE-2014-3660

libxml2: denial of service via recursive entity expansion

parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted XML document containing a large number of nested entity references, a variant of the "billion laughs" attack.

CVSS 2.0 · 5.0 Medium EPSS 3.8% KEV · Not listed
Vendors
Apple Canonical Debian and 2 more
Products
Mac Os X Ubuntu Linux Debian Linux and 2 more
CVE-2015-5312

libxml2: CPU exhaustion when processing specially crafted XML input

The xmlStringLenDecodeEntities function in parser.c in libxml2 before 2.9.3 does not properly prevent entity expansion, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted XML data, a different vulnerability than CVE-2014-3660.

CVSS 2.0 · 7.1 High EPSS 4.5% KEV · Not listed
Vendors
Apple Canonical Debian and 3 more
Products
Iphone Os Mac Os X Tvos and 12 more
CVE-2016-1837

libxml2: Heap use-after-free in htmlPArsePubidLiteral and htmlParseSystemiteral

Multiple use-after-free vulnerabilities in the (1) htmlPArsePubidLiteral and (2) htmlParseSystemiteral functions in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allow remote attackers to cause a denial of service via a crafted XML document.

CVSS 3.0 · 5.5 Medium EPSS 4.4% KEV · Not listed
Vendors
Apple Canonical Debian and 3 more
Products
Iphone Os Mac Os X Tvos and 13 more