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CVE-2026-72757medium5.3

Routinator HTTP server becomes unavailable with many unclosed connections

Impact

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.

Source excerpt · NLnet Labs
Applies when

This only affects users that make their HTTP or RTR server available to untrusted networks.

What to do

This issue is fixed in 0.15.3 and all later versions.

NLnet Labs guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

NLnet Labs · NLnet Labs

Routinator

1 range
NLnet Labs version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

0.15.3 → before *

semver versions

unknown

Other versions: affected

Original source 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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-72757

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-755 ↗

CWE-755 Improper Handling of Exceptional Conditions

NLnet Labs

Related →
Contributing organizations · 2
NLnet Labs

Assigning organization

2026-10-26
CISA-ADP

Additional data publisher

2026-10-26

What changed

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References

1 sources
www.nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt
vendor-advisoryNLnet Labs