CVE-2026-49233: Routinator Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-33mj-99mg-8g73
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CWE-22
Published
Advisory Summary

CVE-2026-49233 is a HIGH path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Routinator libraries in the crates.io ecosystem. The issue involves routinator has cache path traversal when processing the module component of rsync uris. Remediation is available by upgrading affected packages to version 0.15.2.

CVE-2026-49233 at a Glance

CVE Identifier CVE-2026-49233
GHSA Identifier GHSA-33mj-99mg-8g73
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Routinator
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix CVE-2026-49233

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-2026-49233, 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. 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

Routinator does not properly check the module component of rsync URIs, which are used to create the file system paths for the Routinator cache. This allows for path traversal by having a module name containing .., potentially providing an attacker access to the entire Routinator rsync cache.

CVE-2026-49233 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-2026-49233 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49233
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-2026-49233.txt

Frequently Asked Questions

What is CVE-2026-49233?
CVE-2026-49233 is a security vulnerability in Routinator involving Routinator has cache path traversal when processing the module component of rsync URIs under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Routinator versions are affected?
Affected versions include releases prior to 0.15.2 across affected packages: routinator.
What version fixes CVE-2026-49233?
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-2026-49233?
CVE-2026-49233 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check crates.io dependencies for CVE-2026-49233?
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-33mj-99mg-8g73",
  "modified" : "2026-06-12T19:06:10Z",
  "published" : "2026-06-08T15:33:00Z",
  "aliases" : [ "CVE-2026-49233" ],
  "summary" : "Routinator has cache path traversal when processing the module component of rsync URIs",
  "details" : "Routinator does not properly check the module component of rsync URIs, which are used to create the file system paths for the Routinator cache. This allows for path traversal by having a module name containing .., potentially providing an attacker access to the entire Routinator rsync cache.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "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-2026-49233"
  }, {
    "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-2026-49233.txt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-12T19:06:10Z",
    "nvd_published_at" : "2026-06-08T15:16:47Z"
  }
}