Path Traversal in Signalwire Libks
CVE-2026-49846
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.
Vulnerability class: Path Traversal (Directory Traversal)
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Signalwire Libks — versions < 2.0.11
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-49846?
- CVE-2026-49846 is a high-severity vulnerability in Signalwire Libks, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-09-11.
- How severe is CVE-2026-49846?
- High severity. CVSS v3 base score is 7.5 out of 10.