CVE-2026-72757

Medium

Description

Routinator runs out of open connections on the HTTP server when many connections are opened but never closed, leaving the HTTP server unavailable. This condition can be triggered maliciously by an attacker by opening a large number of connections to the HTTP server. This only affects users that make their HTTP or RTR server available to untrusted networks.

SeverityMedium

CVSS5.3

Exploit probability—

ProductRoutinator

PublishedOct 26, 2026

First seenOct 26, 2026

Weakness typeCWE-755CWE-755

How to fix

Vendor advisories

nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt

Affected products

Product	Affected versions	Fixed in
NLnet Labs Routinator	No range specified	—

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.