CVE-2026-9567CWE-404CWE-476

GPAC MP4Box isom_intern.c MergeFragment null pointer dereference

Medium · published May 26, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
4.8
In the wild
Unconfirmed
What it is

A security flaw has been discovered in GPAC up to 2.4.0. Affected is the function MergeFragment of the file src/isomedia/isom_intern.c of the component MP4Box. The manipulation results in null pointer dereference. The attack needs to be approached locally. The exploit has been released to the public and may be used for attacks. The patch is identified as 525bf1af642c30af04e4df5345e6d798c0a4d8a1. It is advisable to implement a patch to correct this issue.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00160 · 4.8th percentile
Weaknesses
CWE-404 · Improper Resource Shutdown or Release; CWE-476 · NULL Pointer Dereference
Published
2026-05-26T17:45Z
EPSS history
Timeline
  • 26 MAY 17:45Z
    GPAC MP4Box isom_intern.c MergeFragment null pointer dereference
    cvelistv5