High severity · published Oct 28, 2026
CVE-2026-118689
OvenMediaEngine through 0.21.0 OVT Relay DoS via Oversized payload_length
New
7.5
CVSS
–
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OV
OvenMediaEngine · OvenMediaLabs
through 0.21.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-118689
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-118689
github.com
https://github.com/OvenMediaLabs/OvenMediaEngine
github.com
https://github.com/OvenMediaLabs/OvenMediaEngine/blob/v0.21.0/src/modules/ovt_packetizer/ovt_depacketizer.cpp#L32-L53
github.com
https://github.com/OvenMediaLabs/OvenMediaEngine/blob/v0.21.0/src/modules/ovt_packetizer/ovt_packet.cpp#L48-L129
github.com
https://github.com/OvenMediaLabs/OvenMediaEngine/commit/ce316146d668a934217f25c777289ca256aa6786
github.com
https://github.com/OvenMediaLabs/OvenMediaEngine/issues/2330
www.vulncheck.com
https://www.vulncheck.com/advisories/ovenmediaengine-through-0.21.0-ovt-relay-dos-via-oversized-payload-length