Vulnerability · Published Jun 8, 2026 · Assigned by NLnet Labs

CVE-2026-49232Routinator exits when accepting an incoming HTTP or RTR connection fails

High 8.7

In plain English

A high-severity security flaw in Routinator from NLnet Labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.3%top 72.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
NLnet Labs	Routinator	see references

Weakness: CWE-755 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

References

https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49232.txt vendor-advisory