CVE-2026-90685: GPAC MP4Box reachable assertion in LSR command processing

CVE-2026-90685 · Severity: low · CVSS 2.8 · Published 2026-09-14

GPAC is an open-source multimedia framework used for video streaming, transcoding, and packaging. MP4Box is a command-line tool within GPAC for manipulating MP4 files. A reachable assertion vulnerability in the LSR command parser can cause MP4Box to crash when processing malformed LSR-encoded media files, leading to denial of service of the tool's functionality.

Technologies: Gpac. Vendors: Gpac.

Quick answers

Is CVE-2026-90685 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-90685 being exploited in the wild.
How severe is CVE-2026-90685?
Low severity, with a CVSS score of 2.8, published 14 September 2026.
Which products and versions are affected?
Gpac up to f1219cde.
Is there a fix for CVE-2026-90685?
A patch was published on 2026-07-27: Patch commit afca1f1181668d85941d51ed1adf647807d5d975 authored; version abi-16.23 or later contains fix Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-90685 attacked?
It is attacked with local access.
Am I affected by CVE-2026-90685?
Check whether you run Gpac at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A reachable assertion exists in the lsr_exec_command_list function within laser/lsr_dec.c of GPAC's MP4Box component. The vulnerability is triggered during the parsing of LSR (Lightweight Scene Representation) command data and allows a local attacker with access to craft malicious LSR-encoded files to trigger the assertion, causing abnormal termination. Local file access is required; the vulnerability cannot be exploited remotely. The issue was addressed in commit afca1f1181668d85941d51ed1adf647807d5d975 and patch is available in version abi-16.23 or later.

Affected products

  • GPAC GPAC up to f1219cde

Timeline

  • 2026-09-14: disclosed
  • 2026-07-27: patched: Patch commit afca1f1181668d85941d51ed1adf647807d5d975 authored; version abi-16.23 or later contains fix

References

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