Vulnerability · Published Sep 14, 2026 · Assigned by VulDB

CVE-2026-90683GPAC MP4Box base_scenegraph.c gf_node_unregister assertion

Low 3.3

In plain English

A low-severity security flaw in GPAC. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 3.1)3.3Low

Exploit odds (30 days)0.2%top 93.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was detected in GPAC up to f1219cde. Affected is the function gf_node_unregister of the file scenegraph/base_scenegraph.c of the component MP4Box. Performing a manipulation results in reachable assertion. Attacking locally is a requirement. The exploit is now public and may be used. Upgrading to version abi-16.23 is able to address this issue. The patch is named 49dee5cad329cfed310c1682703df7daa47df31a. It is advisable to upgrade the affected component. This is not a duplicate of CVE-2021-46237 or CVE-2021-46234.

Affected products (as reported)

Vendor	Product	Versions
n/a	GPAC	f1219cde

Weakness: CWE-617 · Vector: 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

References

VDB-403216 | GPAC MP4Box base_scenegraph.c gf_node_unregister assertion vdb-entry, technical-description
VDB-403216 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-90683 | CVE Analysis and Report third-party-advisory
Submit #913780 | GPAC up to commit f1219cde (2026-07-25) Denial of Service third-party-advisory
https://github.com/gpac/gpac/issues/3823 issue-tracking
https://github.com/r1ck9-2q/cve_summit/blob/main/Vuln%20GPAC%20MP4Box%20Assertion%20Failure%20assert(num_instances).md exploit
https://github.com/gpac/gpac/commit/49dee5cad329cfed310c1682703df7daa47df31a patch
https://github.com/gpac/gpac/releases/tag/abi-16.23 patch
https://github.com/gpac/gpac/ product