CVE-2026-49232 Routinator exits when accepting an incoming HTTP or RTR connection fails
An attacker can cause Routinator to crash by exhausting file descriptors via excessive connections, affecting deployments exposing HTTP or RTR servers to untrusted networks.
- 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-2026-49232?
CVE-2026-49232 is a high-severity denial of service vulnerability in NLnet Labs Routinator, published on 8 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Routinator exits on any error when accepting incoming HTTP or RTR connections, including ones it can recover from such as running out of file descriptors. This condition can be triggered maliciously by an attacker by opening a large number of connections to the HTTP or RTR server.
This only affects users that make their HTTP or RTR server available to untrusted networks.
Weakness: CWE-755
Which versions are affected by CVE-2026-49232?
How do I fix CVE-2026-49232?
No fix has been published for CVE-2026-49232 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-49232 being exploited?
There is no known exploitation of CVE-2026-49232 in the wild and no public exploit code.
Sources
Also known as GHSA-9vvr-6hrm-363j.