Vulnerability · Published Sep 14, 2026 · Assigned by VulDB

CVE-2026-90611GPAC MP4Box loader_xmt.c xmt_parse_element 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 93.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was determined in GPAC up to f1219cde. This impacts the function xmt_parse_element of the file scene_manager/loader_xmt.c of the component MP4Box. Executing a manipulation can lead to reachable assertion. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. Upgrading to version abi-16.23 will fix this issue. This patch is called afca1f1181668d85941d51ed1adf647807d5d975. It is recommended to upgrade the affected component.

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-403193 | GPAC MP4Box loader_xmt.c xmt_parse_element assertion vdb-entry, technical-description
VDB-403193 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-90611 | CVE Analysis and Report third-party-advisory
Submit #913517 | GPAC up to commit f1219cde (2026-07-25) Denial of Service third-party-advisory
https://github.com/gpac/gpac/issues/3820 issue-tracking
https://github.com/r1ck9-2q/cve_summit/blob/main/Vuln-GPAC-MP4Box-Assertion-Failure-in-xmt_parse_element.md exploit
https://github.com/gpac/gpac/commit/afca1f1181668d85941d51ed1adf647807d5d975 patch
https://github.com/gpac/gpac/releases/tag/abi-16.23 patch
https://github.com/gpac/gpac/ product