CVE-2026-44353

Streamlink: Arbitrary local file read via file:// URI in HLS and DASH

State: Published
Severity: 6.5 Medium
Published: May 27, 2026
Updated: May 27, 2026
Reserved: May 5, 2026

Description

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 playlist or .mpd DASH manifest can list file:///path/to/file as a segment, and streamlink will read that local file and write its contents to the output stream. This vulnerability is fixed in 8.4.0.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
streamlinkstreamlink	< 8.4.0Affected

References

https://github.com/streamlink/streamlink/security/advisories/GHSA-hgqw-6m45-hw5f

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