What is CVE-2026-72757?

CVE-2026-72757 is a medium-severity vulnerability, classified under Improper Handling of Exceptional Conditions. CVSS score: 5.3/10. Published 2026-10-26.

How severe is CVE-2026-72757?

Medium severity. CVSS v3 base score is 5.3 out of 10.

CVE-2026-72757

CVE-2026-72757

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.

Published 2026-10-26 · last modified 2026-10-26.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-755 — Improper Handling of Exceptional Conditions

References

www.nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt (vendor-advisory)

Frequently asked questions

What is CVE-2026-72757?: CVE-2026-72757 is a medium-severity vulnerability, classified under Improper Handling of Exceptional Conditions. CVSS score: 5.3/10. Published 2026-10-26.
How severe is CVE-2026-72757?: Medium severity. CVSS v3 base score is 5.3 out of 10.