Medium severity · published Oct 11, 2026
CVE-2026-108538
GPAC MP4Box os_thread.c gf_mx_v use after free
6.3
CVSS
0.2%
EPSS
No
On KEV
Description
A security vulnerability has been detected in GPAC up to 26.07.0. The impacted element is the function gf_mx_v of the file utils/os_thread.c of the component MP4Box. Such manipulation leads to use after free. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GP
GPAC · Gpac
26.07 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-108538
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-108538
vdb-entry
https://vuldb.com/vuln/416193
signature
https://vuldb.com/vuln/416193/cti
third-party-advisory
https://vuldb.com/cve/CVE-2026-108538
third-party-advisory
https://vuldb.com/submit/941979
exploit
https://github.com/user-attachments/files/31270809/PoC.zip
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