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CVE-2026-49232 NLnet Labs CVE debrief

CVE-2026-49232 is a high-severity vulnerability in Routinator, a software used for RPKI-based BGP route validation. The vulnerability has a CVSS score of 8.7 and can cause a denial of service (DoS) condition when accepting incoming HTTP or RTR connections. An attacker can trigger this condition by opening a large number of connections to the HTTP or RTR server, causing the software to exit on any error, including ones it can recover from, such as running out of file descriptors. This vulnerability only affects users who make their HTTP or RTR server available to untrusted networks.

Vendor
NLnet Labs
Product
Routinator
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Users who make their HTTP or RTR server available to untrusted networks should be aware of this vulnerability and take necessary precautions to mitigate the risk.

Technical summary

CVE-2026-49232 is a denial of service vulnerability in Routinator that can be triggered by an attacker opening a large number of connections to the HTTP or RTR server. The vulnerability has a CVSS score of 8.7 and is considered high-severity.

Defensive priority

high

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability.
  • Limit access to the HTTP or RTR server to trusted networks only.
  • Monitor server resources and implement rate limiting to prevent abuse.

Evidence notes

The vulnerability was reported by [email protected] and is documented in CVE-2026-49232.txt [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49232 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49232

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-49232 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49232

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.