SignalWire libks up to 2.0.10 HTTP Request Parser clean_uri path traversal

Summaryinfo

A vulnerability identified as problematic has been detected in SignalWire libks up to 2.0.10. This impacts the function clean_uri of the component HTTP Request Parser. The manipulation leads to path traversal. This vulnerability is traded as CVE-2026-49846. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in SignalWire libks up to 2.0.10 and classified as problematic. This issue affects the function clean_uri of the component HTTP Request Parser. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

libks provides foundational support for signalwire C products. Prior to version 2.0.11, `clean_uri()` in libks's HTTP request parser fails to reject URIs whose path has more segments than its internal canonicalization buffer can hold. The canonicalization step silently passes such URIs through with embedded ".." sequences intact, enabling path traversal in any consumer that later joins the URI with a filesystem path. Version 2.0.11 patches the issue.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-49846 since 06/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 2.0.11 eliminates this vulnerability.

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Productinfo

Vendor

• SignalWire

Name

• libks

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8
• 2.0.9
• 2.0.10

Website

• Product: https://github.com/signalwire/libks/

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CPE 2.2info

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