CVE-2026-49235: Routinator Routinator Crashes When Encountering Maliciously Vulnerability

HIGH
Advisory Identifier: GHSA-5qf9-cf9c-hjc6
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CWE-776 CWE-755 CWE-400
Published
Advisory Summary

CVE-2026-49235 is a HIGH routinator crashes when encountering maliciously vulnerability (CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')) affecting Routinator libraries in the crates.io ecosystem. The issue involves routinator crashes when encountering maliciously crafted rrdp xml files. Remediation is available by upgrading affected packages to version 0.15.2.

CVE-2026-49235 at a Glance

CVE Identifier CVE-2026-49235
GHSA Identifier GHSA-5qf9-cf9c-hjc6
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Affected Product Routinator
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix CVE-2026-49235

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-2026-49235, 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-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion'), where the product uses xml documents and allows their structure to be defined with a document type definition (dtd), but it does not properly control the number of recursive definitions of entities. 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 Routinator encounters a file via RRDP using a specifically crafted Document Type Definition, Routinator crashes.

CVE-2026-49235 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-2026-49235 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49235
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-2026-49235.txt

Frequently Asked Questions

What is CVE-2026-49235?
CVE-2026-49235 is a security vulnerability in Routinator involving Routinator crashes when encountering maliciously crafted RRDP XML files under CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion').
Which Routinator versions are affected?
Affected versions include releases prior to 0.15.2 across affected packages: routinator.
What version fixes CVE-2026-49235?
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 CWE is associated with CVE-2026-49235?
CVE-2026-49235 is classified under CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') (The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.).
How can I check crates.io dependencies for CVE-2026-49235?
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-5qf9-cf9c-hjc6",
  "modified" : "2026-06-12T19:06:16Z",
  "published" : "2026-06-08T15:33:00Z",
  "aliases" : [ "CVE-2026-49235" ],
  "summary" : "Routinator crashes when encountering maliciously crafted RRDP XML files",
  "details" : "When Routinator encounters a file via RRDP using a specifically crafted Document Type Definition, Routinator crashes.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"
  } ],
  "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-2026-49235"
  }, {
    "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-2026-49235.txt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-755", "CWE-776" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-12T19:06:16Z",
    "nvd_published_at" : "2026-06-08T15:16:48Z"
  }
}