VulnerabilityPublished 14 Oct 2026Updated 31 Oct 2026

CVE-2026-92164: Streamlink · HTTPSession follows HTTP redirects into file:// URLs, reading local files

Affects streamlinkSource GCVE Database

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 8.6.0 when convenient.

Data as of 31 Oct 2026, 16:21 UTC

CVSS 3.1 base score

6.5Medium

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 8.6.0

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 14 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade streamlink to 8.6.0.

Patches and advisories

github.com/streamlink/streamlink/commit/4b99c64dde21ea70c24d9ffdbd15849b05f465c6 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Homebrewstreamlink`pkg:brew/streamlink`Other threats	Affected >=0.4.0 <8.6.0	Fixed in 8.6.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Streamlink to version 8.6.0 or later, where this vulnerability is fixed. The vendor has provided an official patch that rejects cross-protocol redirects to file:// URLs, preventing local file reads via redirects. No additional mitigation is required once the upgrade is applied.

Description

Streamlink versions prior to 8.6.0 contain a vulnerability where HTTPSession improperly follows HTTP redirects to file:// URLs. This allows a remote server to cause Streamlink to read local files and expose their contents through the video stream output. The issue is fixed in version 8.6.0.

Impact

An attacker controlling a remote HTTP or HTTPS server can exploit this vulnerability to cause Streamlink to read arbitrary local files on the client system and expose their contents through the video stream output. This results in a confidentiality breach of local files. There is no impact on integrity or availability. The CVSS v3.1 base score is 6.5 (medium severity) with network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality impact, no integrity or availability impact.

References

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