CVE-2026-9567: GPAC · agentprime

GPAC MP4Box isom_intern.c MergeFragment null pointer dereference

CVSS 4.8 MediumEPSS 0.0011 · 1st percentile

Published by the CVE Program (CNA: VulDB) at 26 May 2026, 17:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	GPAC	affected 2.0 affected 2.1 affected 2.2 affected 2.3 affected 2.4.0

Identifiers

CVE-2026-9567

CNA

VulDB

Weakness (CWE)

CWE-404 · CWE-476

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
4.8	Medium	4.0	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	CNA (VulDB)Used for this record
3.3	Low	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	CNA (VulDB)
3.3	Low	3.0	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	CNA (VulDB)
1.7	Low	2.0	AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C	CNA (VulDB)

CISA KEV Not listed.
EPSS 0.0011, the 1st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 26 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

vuldb.com/vuln/365629 vdb-entrytechnical-description
vuldb.com/vuln/365629/cti signaturepermissions-required
vuldb.com/submit/816075 third-party-advisory
github.com/gpac/gpac/issues/3549 issue-tracking
github.com/makesoftwaresafe/gpac/commit/525bf1af642c30af04e4df5345e6d798c0a4d8a1 patch
github.com/gpac/gpac/ product
github.com/user-attachments/files/27196918/poc.zip exploit

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.