CVE-2026-49233: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in NLnet Labs Routinator
CVE-2026-49233 is a path traversal vulnerability in NLnet Labs Routinator caused by improper validation of the module component in rsync URIs. This flaw allows an attacker to use '.. ' in module names to traverse directories and potentially access the entire Routinator rsync cache. The vulnerability has a high severity with a CVSS 4. 0 score of 8. 3. No official patch or remediation guidance has been provided yet, and no known exploits are reported in the wild.
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
CVE-2026-49233 is a path traversal vulnerability in NLnet Labs Routinator caused by improper validation of the module component in rsync URIs. This flaw allows an attacker to use '.. ' in module names to traverse directories and potentially access the entire Routinator rsync cache. The vulnerability has a high severity with a CVSS 4. 0 score of 8. 3. No official patch or remediation guidance has been provided yet, and no known exploits are reported in the wild.
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: 6/8/2026, 2:33:56 PM
Last enriched: 6/8/2026, 2:48:38 PM
Last updated: 6/8/2026, 3:36:53 PM
Views: 3
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