# CVE-2026-49233: NLnet Labs Routinator path traversal in rsync URI module component

Source: https://junglewise.ai/threats/cve-2026-49233-nlnet-labs-routinator-path-traversal-in-rsync-uri-module  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-08. Updated: 2026-06-12  
License: CC BY 4.0 with a link back

CVE-2026-49233 · Severity: high · CVSS 4 · Published 2026-06-08

NLnet Labs Routinator is a software tool used by network operators to verify the security of internet routing. A vulnerability in how it handles data from external servers could allow an attacker to manipulate the local cache files used for routing validation. This could lead to data corruption or service disruptions, potentially affecting the reliability of the network's routing security.

Technologies: [routinator (crates.io)](https://junglewise.ai/threats/technologies/crates-io-routinator), [NLnet Labs Routinator](https://junglewise.ai/threats/technologies/routinator). Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io), [NLnet Labs](https://junglewise.ai/threats/vendors/nlnet-labs).

## Quick answers

**Is CVE-2026-49233 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-49233 being exploited in the wild.

**How severe is CVE-2026-49233?** High severity, with a CVSS score of 4, published 8 June 2026.

**Which products and versions are affected?** routinator (crates.io) SEMVER:introduced=0,fixed=0.15.2; NLnet Labs Routinator <= 0.15.1, up to and including 0.15.1.

**Is there a fix for CVE-2026-49233?** Yes. routinator (crates.io): upgrade to 0.15.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-49233 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-49233?** Check whether you run routinator (crates.io) or NLnet Labs Routinator at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- routinator (crates.io): upgrade to 0.15.2 or later

  ```sh
  cargo update -p routinator
  ```


## Technical details

A path traversal vulnerability (CWE-22) exists in Routinator due to insufficient validation of the module component in rsync URIs. When Routinator processes these URIs to create local filesystem paths for its cache, it fails to filter out directory traversal sequences like '..'. A remote attacker providing a malicious rsync URI can escape the intended cache directory, potentially gaining unauthorized access to or modifying the entire Routinator rsync cache. This issue is resolved in version 0.15.2 by extending path component checks to include the authority and module parts of the URI.

## Affected products

- NLnet Labs Routinator <= 0.15.1

## Identifiers

- CVE-2026-49233
- GHSA-33mj-99mg-8g73

## Timeline

- 2026-06-08: disclosed
- 2026-06-08: patched: Fixed in version 0.15.2
- 2026-06-08: advisory

## References

- [https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49233.txt](https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49233.txt)
- [https://github.com/NLnetLabs/routinator/releases/tag/v0.15.2](https://github.com/NLnetLabs/routinator/releases/tag/v0.15.2)

## Related threats

- [Routinator AS range parsing memory exhaustion](https://junglewise.ai/threats/cve-2026-72758-when-parsing-an-as-range-in-routinator-if-the-maximum-value-of)
- [Routinator HTTP server denial of service via resource exhaustion](https://junglewise.ai/threats/cve-2026-72757-routinator-runs-out-of-open-connections-on-the-http-server-when)
- [Routinator denial of service from malformed rsync URIs](https://junglewise.ai/threats/cve-2026-72756-routinator-exits-when-an-rsync-uri-for-a-file-obtained-over-rrdp)
- [Routinator CRL parsing denial of service](https://junglewise.ai/threats/cve-2026-72754-when-routinator-encounters-a-crl-with-many-entries-it-may-hang-or)
- [Routinator improper RRDP delta entry validation](https://junglewise.ai/threats/cve-2026-72753-when-routinator-encounters-an-rrdp-notification-file-with-gaps-in)