---
title: "CVE-2026-88376: Bento4 - Denial of Service"
description: "Bento4 1.6.0.0 contains an integer underflow vulnerability caused by improper size validation in AP4_AvccAtom::Create() and AP4_HvccAtom::Create(), letting attackers cause denial of service via crafted MP4 files, exploit requires crafted MP4 file."
url: https://panop.io/threat-heartbeat/CVE-2026-88376/
---

# CVE-2026-88376 Bento4 - Denial of Service

Bento4 1.6.0.0 contains an integer underflow vulnerability caused by improper size validation in AP4\_AvccAtom::Create() and AP4\_HvccAtom::Create(), letting attackers cause denial of service via crafted MP4 files, exploit requires crafted MP4 file.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.39% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-88376)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

24 September 2026

Updated

15 October 2026

Weakness

[CWE-191](https://cwe.mitre.org/data/definitions/191.html)

## Vendor fix

Update to the latest version of Bento4.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-88376](https://nvd.nist.gov/vuln/detail/CVE-2026-88376)
- [https://github.com/axiomatic-systems/Bento4/issues/1091](https://github.com/axiomatic-systems/Bento4/issues/1091)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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