What is CVE-2026-49234?

CVE-2026-49234 is a high-severity vulnerability in Nlnet Labs Routinator, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-06-08.

How severe is CVE-2026-49234?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Nlnet Labs Routinator

CVE-2026-49234

When sending a specifically crafted non-UTF-8 string as select-asn query parameter to the /api/v1/origins endpoint, Routinator crashes. This only affects users who allow API access from untrusted networks.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.003 (17.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Nlnet Labs Routinator — versions 0.15.2
Nlnetlabs Routinator

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

sep@nlnetlabs.nl (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-49234?: CVE-2026-49234 is a high-severity vulnerability in Nlnet Labs Routinator, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-06-08.
How severe is CVE-2026-49234?: High severity. CVSS v3 base score is 7.5 out of 10.