High severity · published Jun 8, 2026
CVE-2026-49233
Routinator cache path traversal using rogue rsync URIs
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RO
Routinator · Nlnetlabs
before 0.15.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49233
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49233
Vendor Advisory
https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49233.txt
More from Routinator
8.7
CVE-2026-49232
Routinator exits when accepting an incoming HTTP or RTR connection fails
8.2
CVE-2026-72753
Routinator incorrectly handles delta updates
7.5
CVE-2026-72758
Routinator may exit on malformed ranges
7.5
CVE-2026-72756
Routinator exits on malformed rsync URIs
7.5
CVE-2026-72754
Routinator exits when parsing an incorrect or very large CRL file