Use After Free Vulnerability in GPAC Compositor Affects Multiple Versions
CVE-2026-91087

6.9MEDIUM

Key Information:

Vendor

GPAC

Status
Gpac
Vendor
CVE Published:
15 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-91087?

A vulnerability has been identified in GPAC's Compositor component, specifically within the gf_mo_get_od_id function located in media_object.c. This flaw allows for a use after free condition, which can be exploited remotely. Attackers can leverage this vulnerability to manipulate memory usage, potentially leading to undefined behavior or exploitation. It is highly recommended that users upgrade to version abi-16.24, which applies a patch (commit e34f4ba349d55cd1849f0bcf4cf46552732e2db7) to resolve this issue.

Affected Version(s)

GPAC f1219cde

GPAC abi-16.24

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-2026-91087 - Proof of Concept

References

https://vuldb.com/vuln/403649
vdb-entrytechnical-description
https://vuldb.com/vuln/403649/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-91087
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
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

wsstssw (VulDB User)
.