---
id: CVE-2026-13523
title: A weakness has been identified in GPAC up to 26.02.0
summary: >-
  A weakness has been identified in GPAC up to 26.02.0. This affects an unknown
  part of the file src/utils/base_encoding.c of the component ISOBMFF Parser.
  Executing a manipulation can lead to highly compressed data. The attack needs
  to be…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-404
  - CWE-409
published: '2026-06-29'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-13523'
references:
  - url: 'https://github.com/gpac/gpac/'
    label: cna@vuldb.com
  - url: >-
      https://github.com/gpac/gpac/commit/297f2d8d1f493d8b241330533cd47f7da758aeb3
    label: cna@vuldb.com
  - url: 'https://github.com/gpac/gpac/issues/3588'
    label: cna@vuldb.com
  - url: 'https://github.com/gpac/gpac/pull/3589'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-13523'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/840159'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/374531'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/374531/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-06-29T13:42:12.325Z'
epss: 0.0016
epssPercentile: 0.04394
---

## Overview

A weakness has been identified in GPAC up to 26.02.0. This affects an unknown part of the file src/utils/base_encoding.c of the component ISOBMFF Parser. Executing a manipulation can lead to highly compressed data. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. This patch is called 297f2d8d1f493d8b241330533cd47f7da758aeb3. A patch should be applied to remediate this issue. The vendor confirms: "We added a check on inflate output size, if it surpasses 32 times the input size we stop in error. This value could be adjusted later."

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.