Is CVE-2026-109828 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-109828 being exploited in the wild.

How severe is CVE-2026-109828?

Medium severity, with a CVSS score of 4.3, published 13 October 2026.

Is there a fix for CVE-2026-109828?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-109828 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-109828?

Check whether you run Libsndfile at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-109828: libsndfile uninitialized variable in WAV parsing

CVE-2026-109828 · Severity: medium · CVSS 4.3 · Published 2026-10-13

libsndfile is a C library used to read and write audio files in formats like WAV. A flaw in how it parses WAV file metadata allows attackers to leak uninitialized memory from the application's stack. An attacker could craft a malicious WAV file that, when opened, exposes sensitive data that was previously stored in memory.

Technologies: Libsndfile. Vendors: Libsndfile.

Quick answers

Is CVE-2026-109828 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-109828 being exploited in the wild.
How severe is CVE-2026-109828?: Medium severity, with a CVSS score of 4.3, published 13 October 2026.
Which products and versions are affected?: Libsndfile up to 1.2.2.
Is there a fix for CVE-2026-109828?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-109828 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-109828?: Check whether you run Libsndfile at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The wavlike_subchunk_parse function in src/wavlike.c fails to initialize variables before use when parsing short 'labl' subchunks in WAV files, leading to use of uninitialized stack memory (CWE-457). Remote exploitation is possible through a crafted WAV file; no authentication or user interaction beyond opening the file is required. An attacker gains the ability to read uninitialized stack memory.

Affected products

libsndfile libsndfile up to 1.2.2

Timeline

2026-10-13: disclosed

References

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