CVE-2026-118689 OvenMediaEngine through 0.21.0 OVT Relay DoS via Oversized payload_length

High 8.7 Published 28 Oct 2026 Updated 28 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-118689?

CVE-2026-118689 is a high-severity vulnerability in OvenMediaLabs OvenMediaEngine, published on 28 Oct 2026.

Official description

OvenMediaEngine through 0.21.0 contains a denial of service vulnerability in OvtPacket::LoadHeader() that allows unauthenticated attackers to stall connections by sending payload_length values above 32750. Attackers can send crafted OVT packets to the OVT listener to hold connections open indefinitely and accumulate buffered memory, disrupting origin-to-edge stream relay.

Weakness: CWE-770

Which versions are affected by CVE-2026-118689?

How do I fix CVE-2026-118689?

No fix has been published for CVE-2026-118689 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-118689 being exploited?

There is no known exploitation of CVE-2026-118689 in the wild and no public exploit code.

Sources

Also known as GHSA-c237-3r77-c8g5.