External Control of File Name or Path in streamlink - #VU149944
Published: September 15, 2026
Vulnerability identifier: #VU149944
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-73
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper validation of redirect target schemes in HTTPSession redirect handling when following HTTP redirects. A remote attacker can return a redirect to a file URL to disclose sensitive information.
User interaction is required to invoke an attacker-controlled playlist, manifest, or referenced URL.
Affected software
streamlink
Remediation
Install security update from vendor's website.
streamlink - update to 8.6.0