CVE-2026-49234: Routinator Routinator Crashes When Sending A Vulnerability

HIGH
Advisory Identifier: GHSA-gc6q-cwcj-3vh9
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CVSS 7.5
CWE-20
Published
Advisory Summary

CVE-2026-49234 is a HIGH (CVSS 7.5) routinator crashes when sending a vulnerability (CWE-20: Improper Input Validation) affecting Routinator libraries in the crates.io ecosystem. The issue involves routinator crashes when sending a maliciously crafted select-asn query parameter. Remediation is available by upgrading affected packages to version 0.15.2.

CVE-2026-49234 at a Glance

CVE Identifier CVE-2026-49234
GHSA Identifier GHSA-gc6q-cwcj-3vh9
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Routinator
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-49234

To remediate this vulnerability, upgrade all affected Routinator dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

routinator fixed: 0.15.2 
Upgrade routinator to 0.15.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for routinator

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-49234, inspect your project dependencies for Routinator:

inspect dependencies for routinator

Analyze the terminal output to locate any version of Routinator in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.15.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Routinator, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-49234 Affected Routinator Versions

1 component(s)
Fixed Versions:
0.15.2
Product / Package Ecosystem Affected Versions Fixed Version
routinator
 crates.io
< 0.15.2
0.15.2

References

NVD — CVE-2026-49234 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49234
Routinator Source Repository REPOSITORY
https://github.com/NLnetLabs/routinator
Routinator Release RELEASE
https://github.com/NLnetLabs/routinator/releases/tag/v0.15.2
www.nlnetlabs.nl/downloads/routinato... WEB
https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49234.txt

Frequently Asked Questions

What is CVE-2026-49234?
CVE-2026-49234 is a security vulnerability in Routinator involving Routinator crashes when sending a maliciously crafted select-asn query parameter under CWE-20: Improper Input Validation.
Which Routinator versions are affected?
Affected versions include releases prior to 0.15.2 across affected packages: routinator.
What version fixes CVE-2026-49234?
Upgrading to 0.15.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is routinator affected?
Yes, routinator is affected in releases prior to 0.15.2. Upgrade your dependency to 0.15.2 or later.
What is the CVSS score of CVE-2026-49234?
CVE-2026-49234 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-49234?
CVE-2026-49234 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check crates.io dependencies for CVE-2026-49234?
Run the dependency tree command: 'inspect dependencies for routinator'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gc6q-cwcj-3vh9",
  "modified" : "2026-06-12T19:06:21Z",
  "published" : "2026-06-08T15:33:00Z",
  "aliases" : [ "CVE-2026-49234" ],
  "summary" : "Routinator crashes when sending a maliciously crafted select-asn query parameter",
  "details" : "When sending a specifically crafted non-UTF-8 string as select-asn query parameter to the /api/v1/origins endpoint, Routinator crashes. \n\nThis only affects users who allow API access from untrusted networks.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "routinator"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.15.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.15.1"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-49234"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/NLnetLabs/routinator"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/NLnetLabs/routinator/releases/tag/v0.15.2"
  }, {
    "type" : "WEB",
    "url" : "https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49234.txt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-12T19:06:21Z",
    "nvd_published_at" : "2026-06-08T15:16:48Z"
  }
}