JLSEC-2026-573

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a malformed HEIF sequence file can trigger an out-of-bounds read in core sequence parsing logic, causing DoS. A malformed file can have stco.entrycount == 0 creating no chunks while still passing validation...

python-markdown: denial of service via malformed HTML-like sequences

A flaw was found in Python-Markdown. Parsing crafted markdown content containing malformed HTML-like sequences causes html.parser.HTMLParser to raise an unhandled AssertionError. This unhandled exception allows an attacker to cause an application crash and potentially disclose sensitive informati...

CVE-2026-41069 libheif allows Out-of-bounds vector access leading to invalid dereference (DoS)

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a malformed HEIF sequence file can trigger an out-of-bounds read in core sequence parsing logic, causing DoS. A malformed file can have stco.entrycount == 0 creating no chunks while still passing validation...

python-markdown: denial of service via malformed HTML-like sequences

A flaw was found in Python-Markdown. Parsing crafted markdown content containing malformed HTML-like sequences causes html.parser.HTMLParser to raise an unhandled AssertionError. This unhandled exception allows an attacker to cause an application crash and potentially disclose sensitive informati...

CVE-2025-69534

Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsing. Because Python-Markdown does not catch this exception, any application that processes attacker-controlled Markdown...

EUVD-2003-0995

Malware in sbrugna...

expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences for example, from start tag names to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor...

expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences for example, from start tag names to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor...

CentOS 7 : thunderbird (RHSA-2022:0850)

The remote CentOS Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2022:0850 advisory. - It may be possible for an attacker to craft an email message that causes Thunderbird to perform an out-of- bounds write of one byte when processing t...

expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences for example, from start tag names to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor...

expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences for example, from start tag names to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor...

expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences for example, from start tag names to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor...

expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences for example, from start tag names to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor...

expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences for example, from start tag names to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor...

expat: buffer over-read and crash on XML with malformed UTF-8 sequences

The updatePosition function in lib/xmltokimpl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service application crash via an XML document with crafted UTF-8 sequences that trigger a buffer over-read,...

security flaw

OpenSSL 0.9.6k allows remote attackers to cause a denial of service crash via large recursion via malformed ASN.1 sequences...