Description
A flaw was found in GStreamer's adaptive streaming demuxers (HLS, DASH, MSS). When processing a media playlist or manifest, URIs referenced in the manifest content are fetched without restricting which URI schemes are permitted. An attacker who controls a manifest URL, or who can inject content into an HTTP manifest response, can include file:// URIs pointing to arbitrary local files, causing the affected application to read and process those files. In automated or server-side deployments such as media recorders, proxies, and downloaders, this can lead to disclosure of sensitive local files. Existence of files can also be inferred through differing error responses even when content is not directly observable.
Published: 2026-11-09
Score: 7.5 High
EPSS: n/a
KEV: No
AI Analysis

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Remediation

Vendor Workaround

Avoid opening HLS, DASH, or MSS manifests from untrusted network sources. Run GStreamer-based applications with minimal filesystem access using Linux namespaces or containers, restricting the process to only the directories it legitimately requires. Where feasible, use network controls to limit which manifest hosts the application may contact. These measures reduce risk but do not remove the vulnerability.

Tracking

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Advisories

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History

Mon, 09 Nov 2026 11:45:00 +0000

Type Values Removed Values Added
Description A flaw was found in GStreamer's adaptive streaming demuxers (HLS, DASH, MSS). When processing a media playlist or manifest, URIs referenced in the manifest content are fetched without restricting which URI schemes are permitted. An attacker who controls a manifest URL, or who can inject content into an HTTP manifest response, can include file:// URIs pointing to arbitrary local files, causing the affected application to read and process those files. In automated or server-side deployments such as media recorders, proxies, and downloaders, this can lead to disclosure of sensitive local files. Existence of files can also be inferred through differing error responses even when content is not directly observable.
Title Gst-plugins-good: gst-plugins-good: local file disclosure via unvalidated file:// uris in adaptivedemux2 manifest handling
First Time appeared Redhat
Redhat enterprise Linux
Redhat rhel Els
Weaknesses CWE-73
CPEs cpe:/a:redhat:enterprise_linux:10
cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9
cpe:/o:redhat:rhel_els:6
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat
Redhat enterprise Linux
Redhat rhel Els
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}


Subscriptions

Redhat Enterprise Linux Rhel Els
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-11-09T11:35:18.991Z

Reserved: 2026-11-03T16:58:46.246Z

Link: CVE-2026-121629

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-09T12:16:37.847

Modified: 2026-11-09T12:16:37.983

Link: CVE-2026-121629

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-09T12:30:10Z

Weaknesses