CVE-2026-49232Network attack vector

Service exit via fatal transient accept errors

Published Jun 8, 2026 · Updated Jun 8, 2026

Denial of service in NLnet Labs Routinator 0.15.1 and earlier allows remote attackers to terminate the service via connection flooding. The HTTP and RTR listener accept loops treat every socket-accept error as fatal, so file-descriptor exhaustion from many open connections exits the process instead of ignoring the transient error. Exposure requires either server to be reachable from an untrusted network and interrupts RPKI validation and delivery until the service restarts.

CVSS severity8.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in NLnet Labs Routinator 0.15.1 and earlier allows remote attackers to terminate the service via connection flooding. The HTTP and RTR listener accept loops treat every socket-accept error as fatal, so file-descriptor exhaustion from many open connections exits the process instead of ignoring the transient error. Exposure requires either server to be reachable from an untrusted network and interrupts RPKI validation and delivery until the service restarts.

The record

CVE
CVE-2026-49232
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
NLnet Labs
Product
Routinator
Classifications
CWE-755, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NLnet Labs · RoutinatorAffected versions are unavailable in this record.

Published CVSS scores

8.7NLnet LabsCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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