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Fencer Intel
high 7.5

CVE-2026-121629 json

Gst-plugins-good: gst-plugins-good: local file disclosure via unvalidated file:// uris in adaptivedemux2 manifest handling

published 2d ago modified 4h ago also EUVD-2026-119997

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:1.26.7-10.el10_3.1
  • Red Hat Red Hat Enterprise Linux 10.2 Extended Update Support 0:1.26.7-2.el10_2.9
  • gst-plugins-good1.0 Debian 14 1.28.9-1

debian advisories DEBIAN-CVE-2026-121629

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-121629 updated cvss 7.5

gst-plugins-good: gst-plugins-good: Local file disclosure via unvalidated file:// URIs in adaptivedemux2 manifest handling

  • Red Hat Enterprise Linux AppStream (v. 10) gstreamer1-plugins-good 1.26.7-10.el10_3.1, gstreamer1-plugins-good-gtk 1.26.7-10.el10_3.1
    fixed: vendor fix RHSA-2026:98644
  • Red Hat Enterprise Linux AppStream EUS (v.10.2) gstreamer1-plugins-good 1.26.7-2.el10_2.9, gstreamer1-plugins-good-gtk 1.26.7-2.el10_2.9
    fixed: vendor fix RHSA-2026:99140
  • Red Hat Enterprise Linux 6 gstreamer-plugins-good Red Hat Enterprise Linux 7 gstreamer-plugins-good, gstreamer1-plugins-good Red Hat Enterprise Linux 8 gstreamer1-plugins-good, gstreamer1-plugins-good-gtk Red Hat Enterprise Linux 9 gstreamer1-plugins-good, gstreamer1-plugins-good-gtk
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.2 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-73 External Control of File Name or Path

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.