CVE-2026-49233 PUBLISHED

Routinator cache path traversal using rogue rsync URIs

Assigner: NLnet Labs
Reserved: 28.05.2026 Published: 08.06.2026 Updated: 08.06.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	NLnet Labs
Product	Routinator
Versions	Default: affected unaffected from 0.15.2 to * (excl.)

Solutions

This issue is fixed in 0.15.2 and all later versions.

Credits

X41 D-Sec GmbH finder

References

https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49233.txt

Problem Types

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE