ISOBMFF Parser Vulnerability in GPAC Affects Data Processing
CVE-2026-13523

4.8MEDIUM

Key Information:

Vendor

GPAC

Status
Gpac
Vendor
CVE Published:
29 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13523?

A vulnerability exists in the ISOBMFF Parser component of GPAC that can be exploited through local manipulation of highly compressed data. This issue, identified in the file src/utils/base_encoding.c, allows an attacker to execute an attack that may lead to uncontrolled resource consumption. The vendor has provided a patch that implements a check on inflate output size, ensuring it does not exceed 32 times the input size. Developers are advised to apply the patch, identified as commit 297f2d8d1f493d8b241330533cd47f7da758aeb3, to remediate the vulnerability.

Affected Version(s)

GPAC 26.02

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-13523 - Proof of Concept

References

https://vuldb.com/vuln/374531
vdb-entry
https://vuldb.com/vuln/374531/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13523
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Fantasy (VulDB User)
VulDB CNA Team
.