CVE-2026-66046

A flaw was found in the Expat XML parsing library. A remote, unauthenticated attacker can supply a specially crafted XML document to trigger quadratic algorithmic complexity in the storeAtts function, causing excessive CPU consumption and a denial of service Mitigation To mitigate, avoid parsing...

OESA-2026-3670 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: Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts...

TencentOS Server 4: xmlrpc-c (TSSA-2026:0877)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0877 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:...

SUSE CVE-2026-66046

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an ON^2 linear scan of elementType-defaultAtts to determine CDATA status. ...

AZL-96605 CVE-2026-66046 affecting package expat for versions less than 2.8.3-2

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an ON^2 linear scan of elementType-defaultAtts to determine CDATA status. ...

ALPINE-CVE-2026-66046

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an ON^2 linear scan of elementType-defaultAtts to determine CDATA status. ...

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 storeAtts function. An attacker can cause memory corruption or potentially execute arbitrary code by providing specially crafted input that triggers the...

OESA-2023-1464 firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. Security Fixes: In Expat aka libexpat before 2.4.3, a left shift by 29 or more places in the storeAtts function in xmlparse.c can lead to realloc misbehavior e.g., allocating too few...

expat: Integer overflow in storeAtts in xmlparse.c

expat libexpat is susceptible to a software flaw that causes process interruption. When processing a large number of prefixed XML attributes on a single tag can libexpat can terminate unexpectedly due to integer overflow. The highest threat from this vulnerability is to availability,...

expat: Integer overflow in storeAtts in xmlparse.c

expat libexpat is susceptible to a software flaw that causes process interruption. When processing a large number of prefixed XML attributes on a single tag can libexpat can terminate unexpectedly due to integer overflow. The highest threat from this vulnerability is to availability,...

The vulnerability of the storeAtts() function in the Expat library allows a hacker to trigger a service failure.

The vulnerability of the storeAtts function in the Expat library is related to an uncontrolled resource consumption. Exploiting this vulnerability could allow a remote attacker to cause service interruptions...

Denial Of Service (DoS)

expat is vulnerable to denial-of-service. The vulnerability exists in storeAtts function in xmlparse.c may lead to realloc misbehavior, allowing a malicious user to cause an application crash...

PT-2022-1760 · Expat +12 · Expat +12

Name of the Vulnerable Software and Affected Versions: Expat aka libexpat versions prior to 2.4.3 Description: The issue is related to an integer overflow in the storeAtts function in xmlparse.c of the Expat library. This could allow a remote attacker to execute arbitrary code. Recommendations: F...

UBUNTU-CVE-2021-45960

In Expat aka libexpat before 2.4.3, a left shift by 29 or more places in the storeAtts function in xmlparse.c can lead to realloc misbehavior e.g., allocating too few bytes, or only freeing memory...

CVE-2021-45960

In Expat aka libexpat before 2.4.3, a left shift by 29 or more places in the storeAtts function in xmlparse.c can lead to realloc misbehavior e.g., allocating too few bytes, or only freeing memory...