CVE-2026-49233: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in NLnet Labs Routinator
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.
AI Analysis
Technical Summary
NLnet Labs Routinator does not properly validate the module component of rsync URIs used to construct filesystem paths for its cache. This improper limitation of pathname (CWE-22) enables path traversal attacks by including '..' in the module name, potentially granting unauthorized access to the entire Routinator rsync cache directory. The vulnerability is remotely exploitable without privileges or user interaction, with high impact on confidentiality and integrity.
Potential Impact
An attacker can exploit this vulnerability to perform path traversal, gaining unauthorized read access to files within the Routinator rsync cache directory. This could lead to exposure of sensitive cached data. The CVSS 4.0 score of 8.3 reflects high severity due to network attack vector, no required privileges or user interaction, and high impact on confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the NLnet Labs vendor advisory for current remediation guidance. Until an official fix is available, users should monitor vendor communications for updates. No temporary or official fixes are currently documented.
CVE-2026-49233: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in NLnet Labs Routinator
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 v4.0
Score 8.3high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
NLnet Labs Routinator does not properly validate the module component of rsync URIs used to construct filesystem paths for its cache. This improper limitation of pathname (CWE-22) enables path traversal attacks by including '..' in the module name, potentially granting unauthorized access to the entire Routinator rsync cache directory. The vulnerability is remotely exploitable without privileges or user interaction, with high impact on confidentiality and integrity.
Potential Impact
An attacker can exploit this vulnerability to perform path traversal, gaining unauthorized read access to files within the Routinator rsync cache directory. This could lead to exposure of sensitive cached data. The CVSS 4.0 score of 8.3 reflects high severity due to network attack vector, no required privileges or user interaction, and high impact on confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the NLnet Labs vendor advisory for current remediation guidance. Until an official fix is available, users should monitor vendor communications for updates. No temporary or official fixes are currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- NLnet Labs
- Date Reserved
- 2026-05-28T08:28:56.664Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a26d2d4e29bf47b50f21ca3
Added to database: 06/08/2026, 14:33:56 UTC
Last enriched: 06/08/2026, 14:48:38 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 70
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