Heap-Based Buffer Overflow in GPAC MPEG Video Reframer by GPAC
CVE-2026-91086

5.3MEDIUM

Key Information:

Vendor

GPAC

Status
Gpac
Vendor
CVE Published:
15 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-91086?

A security vulnerability has been identified in the MPEG Video Reframer function, specifically in the mpgviddmx_process of the filters/reframe_mpgvid.c file of GPAC up to version f1219cde. This vulnerability allows for heap-based buffer overflow, making it possible for attackers to execute remote exploits. The vulnerability has been publicly disclosed, and it is strongly advised to upgrade to version abi-16.23 to mitigate the risk. The corresponding patch is identified as afca1f1181668d85941d51ed1adf647807d5d975.

Affected Version(s)

GPAC f1219cde

GPAC abi-16.23

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-2026-91086 - Proof of Concept

References

https://vuldb.com/vuln/403647
vdb-entrytechnical-description
https://vuldb.com/vuln/403647/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-91086
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

wsstssw (VulDB User)
.