CVE-2026-49846CWE-22CWE-697path-traversal

CVE-2026-49846

High · published September 12, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
42.1
In the wild
Unconfirmed
What it 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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00503 · 42.1th percentile
Weaknesses
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'); CWE-697 · Incorrect Comparison
Published
2026-09-12T02:16Z
References (1)
https://github.com/signalwire/libks/security/advisories/GHSA-684h-wjm9-2p6j · [email protected]
EPSS history
Timeline
  • 13 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 11 SEP 21:25Z
    libks has path traversal in kws HTTP parser via URI segment overflow
    cvelistv5