CVE-2026-109828: libsndfile Insecure Default Variable Initialization

Vulnerability summary

CVE-2026-109828 is a medium (CVSS 5.3) Insecure Default Variable Initialization vulnerability in libsndfile. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 13-10-2026
   PublishedVulnerability first disclosed.
2. 13-10-2026
   Last modifiedVulnerability information updated.

Description

A vulnerability was found in libsndfile up to 1.2.2. This issue affects the function wavlike_subchunk_parse of the file src/wavlike.c of the component WAV Parsing. Performing a manipulation results in use of uninitialized variable. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.

• CWE-453Insecure Default Variable InitializationThe product, by default, initializes an internal variable with an insecure or less secure value than is possible.
• CWE-457Use of Uninitialized VariableThe code uses a variable that has not been initialized, leading to unpredictable or unintended results.