CVE-2026-92399 GPAC WebSocket rmt_ws.c rmt_client_handle_ws_frame heap-based overflow
A heap-based buffer overflow in GPAC's WebSocket handler allows remote attackers to execute arbitrary code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-92399?
CVE-2026-92399 is a medium-severity memory corruption vulnerability in GPAC, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was determined in GPAC 26.07.0. This affects the function rmt_client_handle_ws_frame of the file src/utils/rmt_ws.c of the component WebSocket Handler. Executing a manipulation of the argument payload_size can lead to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version abi-16.26 is able to mitigate this issue. This patch is called 37bccbb30cf53a0e1a084cea9a1ce422b3ddfe12. Upgrading the affected component is recommended.
Which versions are affected by CVE-2026-92399?
How do I fix CVE-2026-92399?
No fix has been published for CVE-2026-92399 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-92399 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92399 exists.
Sources
Also known as GHSA-mmf7-gvjr-4mjf, UBUNTU-CVE-2026-92399.