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CVE-2026-44353— Streamlink: Arbitrary local file read via file:// URI in HLS and DASH

Quick assessment

Affected
streamlink streamlink
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Streamlink是streamlink开源的一个将网络直播流推送至视频播放器的命令行工具。 Streamlink 8.4.0之前版本存在安全漏洞，该漏洞源于HLS和DASH解析器未验证段条目的URI方案，可能导致远程播放列表读取本地文件。

CVSS 6.5 · Medium EPSS 0.34% · P28

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 1

VendorProduct Version RangeStatus
streamlink streamlink < 8.4.0 affected
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I. Basic Information for CVE-2026-44353

Vulnerability Information
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Vulnerability Title
Streamlink: Arbitrary local file read via file:// URI in HLS and DASH
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Streamlink 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Streamlink是streamlink开源的一个将网络直播流推送至视频播放器的命令行工具。 Streamlink 8.4.0之前版本存在安全漏洞，该漏洞源于HLS和DASH解析器未验证段条目的URI方案，可能导致远程播放列表读取本地文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
streamlink streamlink < 8.4.0 -

II. Public POCs for CVE-2026-44353

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III. Intelligence Information for CVE-2026-44353

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Vendor Advisories for CVE-2026-44353 (1)

IV. Related Vulnerabilities

Same product: streamlink
Same vendor: streamlink
Same weakness: CWE-22

V. Comments for CVE-2026-44353

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