# CVE-2026-32837: mackron / miniaudio Out-of-Bounds Read in BEXT Coding History Parsing

> Attackers can cause application crashes or denial of service by processing crafted WAV files with malformed BEXT metadata in the miniaudio library.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Mar 2026
- **Updated:** 14 Jul 2026
- **Also known as:** DEBIAN-CVE-2026-32837, GHSA-grfx-q7pf-j7ff, UBUNTU-CVE-2026-32837

## What is CVE-2026-32837?

CVE-2026-32837 is a medium-severity memory corruption vulnerability in mackron miniaudio, published on 17 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

miniaudio version 0.11.25 and earlier (fixed in commits 1df46ae and 1df46ae) contain a heap out-of-bounds read vulnerability in the WAV BEXT metadata parser that allows attackers to trigger memory access violations by processing crafted WAV files. Attackers can exploit improper null-termination handling in the coding history field to cause out-of-bounds reads past the allocated metadata pool, resulting in application crashes or denial of service.

Weakness: CWE-170 (Improper Null Termination)

## Which versions are affected by CVE-2026-32837?

It affects 1 product.


Products: Mackron Miniaudio.

## How do I fix CVE-2026-32837?

Apply the vendor's patch.

## Is CVE-2026-32837 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32837 exists.

## Other vulnerabilities in mackron miniaudio

- [CVE-2021-34184](https://insights.sbomify.com/CVE-2021-34184/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-34185](https://insights.sbomify.com/CVE-2021-34185/): Integer overflow in n/a (high 7.8)
- [CVE-2024-41147](https://insights.sbomify.com/CVE-2024-41147/): Memory corruption in Miniaudio (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-32837 and fix it if it is affected.

What it is: CVE-2026-32837 is a medium-severity memory corruption vulnerability in mackron miniaudio, published on 17 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32837 exists.

Affected product: mackron miniaudio. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-32837/ (Markdown: https://insights.sbomify.com/CVE-2026-32837/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-32837
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-32837
- OSV: https://osv.dev/vulnerability/CVE-2026-32837

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-32837/
Summaries are generated and may contain mistakes; the official description above is the record.