What is CVE-2026-44353?

CVE-2026-44353 is a medium-severity vulnerability in Streamlink, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-05-27.

How severe is CVE-2026-44353?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Path Traversal in Streamlink

CVE-2026-44353

Streamlink is a CLI utility which pipes video streams from various services into a video player. Prior to 8.4.0, Streamlink's HLS and DASH parsers do not validate the URI scheme of segment entries and other resources. A remote .m3u8 HLS pl…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (10.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Streamlink — versions < 8.4.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44353?: CVE-2026-44353 is a medium-severity vulnerability in Streamlink, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-05-27.
How severe is CVE-2026-44353?: Medium severity. CVSS v3 base score is 6.5 out of 10.