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Vulnerability record · CVE-2026-49234 · published 8 June 2026

CVE-2026-49234: Nlnetlabs routinator improper input validation vulnerability

Nlnetlabs · Routinator

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.

8.2 CVSS 4.0 High EPSS 0.33% · top 76.0% CWE-20 · Improper input validation
8.2CVSS 4.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
23 Jul 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49234.txt Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2026-49235Nlnetlabs routinator vulnerabilityWhen Routinator encounters a file via RRDP using a specifically crafted Document Type Definition, Routinator crashes.EPSS 0.46%8.3CVE-2026-49233Nlnetlabs routinator path traversal vulnerabilityRoutinator does not properly check the module component of rsync URIs, which are used to create the file system paths for the Routinator cache. This …EPSS 0.50%7.5CVE-2024-1622Nlnetlabs routinator vulnerabilityDue to a mistake in error checking, Routinator will terminate when an incoming RTR connection is reset by the peer too quickly after opening.EPSS 1.0%7.5CVE-2023-39915Nlnetlabs routinator vulnerabilityNLnet Labs' Routinator up to and including version 0.12.1 may crash when trying to parse certain malformed RPKI objects. This is due to insufficient …EPSS 0.62%7.5CVE-2022-3029Nlnetlabs routinator vulnerabilityIn NLnet Labs Routinator 0.9.0 up to and including 0.11.2, due to a mistake in error handling, data in RRDP snapshot and delta files that isn’t corre…EPSS 0.92%7.5CVE-2021-43172Nlnetlabs routinator vulnerabilityNLnet Labs Routinator prior to 0.10.2 happily processes a chain of RRDP repositories of infinite length causing it to never finish a validation run. …EPSS 1.3%7.5CVE-2021-43173Nlnetlabs routinator uncontrolled resource consumption vulnerabilityIn NLnet Labs Routinator prior to 0.10.2, a validation run can be delayed significantly by an RRDP repository by not answering but slowly drip-feedin…EPSS 1.5%7.5CVE-2021-43174Nlnetlabs routinator out-of-bounds write vulnerabilityNLnet Labs Routinator versions 0.9.0 up to and including 0.10.1, support the gzip transfer encoding when querying RRDP repositories. This encoding ca…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2026-49234), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.