OvenMediaLabs OvenMediaEngine up to 0.21.0 OvtPacket OvtPacket::LoadHeader denial of service

Summaryinfo

A vulnerability classified as problematic was found in OvenMediaLabs OvenMediaEngine up to 0.21.0. This affects the function OvtPacket::LoadHeader of the component OvtPacket. The manipulation results in denial of service. This vulnerability is reported as CVE-2026-118689. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in OvenMediaLabs OvenMediaEngine up to 0.21.0. Affected is the function OvtPacket::LoadHeader of the component OvtPacket. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-118689 since 10/28/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• OvenMediaLabs

Name

• OvenMediaEngine

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21.0

Website

• Product: https://github.com/OvenMediaLabs/OvenMediaEngine/

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