Vulnerability · Published Oct 26, 2026 · Assigned by NLnet Labs

CVE-2026-72752Routinator exits when requesting the output repeatedly

Medium 6.5

In plain English

A medium-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 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 84.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Routinator runs out of memory when the JSON output is requested many times concurrently. This condition can be triggered maliciously by an attacker by opening a large number of connections to the HTTP server. Additionally Routinator runs into a stack overflow and exits when a payload item with too much metadata is discarded at once. 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:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72752.txt vendor-advisory