CVE-2026-72757

Routinator HTTP server becomes unavailable with many unclosed connections

Published Oct 26, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

This issue is fixed in 0.15.3 and all later versions.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Nlnetlabs
Nlnetlabs routinator
Vendors & Products Nlnetlabs
Nlnetlabs routinator
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Routinator HTTP server becomes unavailable with many unclosed connections
Weaknesses CWE-755
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
NLnet Labs
Published
Updated
Oct 26, 2026, 5:57 PM
Reserved
Aug 10, 2026, 2:08 PM
Status
Deferred
Published
Oct 26, 2026, 6:18 PM
Modified
Oct 26, 2026, 6:35 PM