CVE-2026-49846: Signalwire Libks

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Signalwire Libks: before 2.0.11 (fixed in 2.0.11)

Published 2026-09-11. Last modified 2026-09-30.