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CVE-2026-49233 Nlnetlabs CVE debrief

CVE-2026-49233 is a HIGH-severity vulnerability in Routinator, a software developed by Nlnetlabs. The vulnerability has a CVSS score of 8.3 and was published on 2026-06-08. The issue arises from Routinator's improper handling of the module component in rsync URIs, which can lead to path traversal attacks. This vulnerability potentially allows an attacker to access the entire Routinator rsync cache.

Vendor
Nlnetlabs
Product
Routinator
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-06-12
Advisory published
2026-06-08
Advisory updated
2026-06-12

Who should care

Users of Routinator, especially those using versions prior to 0.15.2, should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by Routinator not properly checking the module component of rsync URIs. This allows for path traversal by having a module name containing .., potentially providing an attacker access to the entire Routinator rsync cache.

Defensive priority

HIGH

Recommended defensive actions

  • Update Routinator to version 0.15.2 or later.
  • Review and restrict access to the Routinator rsync cache.
  • Monitor for suspicious activity related to Routinator.

Evidence notes

The CVE record and NVD detail pages provide additional information about this vulnerability.

Official resources

CVE-2026-49233 was published on 2026-06-08 and modified on 2026-06-12.