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Fencer Vulns
high 7.8

CVE-2026-18295 json

GStreamer MRF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

published 2026-08-20 2 mo ago modified 2026-10-26 14 d ago also EUVD-2026-63444

cvss
7.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

GStreamer MRF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of MRF files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29510.

Patch / fix

  • gstreamer gstreamer 1.28.5
  • gst-plugins-good1.0 Debian 14 1.28.5-1

debian advisories DEBIAN-CVE-2026-18295

  • gst-plugins-good1.0 Ubuntu 22.04 LTS 1.20.3-0ubuntu1.9
  • gst-plugins-good1.0 Ubuntu 24.04 LTS 1.24.2-1ubuntu1.7
  • gst-plugins-good1.0 Ubuntu 26.04 LTS 1.28.2-2ubuntu0.3
  • gst-plugins-good1.0 Ubuntu Pro 16.04 LTS 1.8.3-1ubuntu0.5+esm3
  • gst-plugins-good1.0 Ubuntu Pro 18.04 LTS 1.14.5-0ubuntu1~18.04.3+esm3
  • gst-plugins-good1.0 Ubuntu Pro 20.04 LTS 1.16.3-0ubuntu1.3+esm3

ubuntu advisories UBUNTU-CVE-2026-18295

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gstreamer1-plugins-good RHEL 9 1.22.12-7.el9_8.8
  • gstreamer1-plugins-good-gtk RHEL 9 1.22.12-7.el9_8.8
  • gstreamer1-plugins-good RHEL 8 1.16.1-7.el8_10.7
  • gstreamer1-plugins-good-gtk RHEL 8 1.16.1-7.el8_10.7
  • gstreamer1-plugins-good RHEL 10.2 1.26.7-2.el10_2.7
  • gstreamer1-plugins-good-gtk RHEL 10.2 1.26.7-2.el10_2.7
  • gstreamer1-plugins-good RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 1.16.1-4.el8_4.5
  • gstreamer1-plugins-good-gtk RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 1.16.1-4.el8_4.5

red hat advisories RHSA-2026:73424RHSA-2026:73040RHSA-2026:72482RHSA-2026:72367RHSA-2026:71650RHSA-2026:71648

  • gstreamer1-plugins-good AlmaLinux 10 1.26.7-2.el10_2.7
  • gstreamer1-plugins-good-gtk AlmaLinux 10 1.26.7-2.el10_2.7
  • gstreamer1-plugins-good AlmaLinux 9 1.22.12-7.el9_8.8
  • gstreamer1-plugins-good-gtk AlmaLinux 9 1.22.12-7.el9_8.8
  • gstreamer1-plugins-good AlmaLinux 8 1.16.1-7.el8_10.7
  • gstreamer1-plugins-good-gtk AlmaLinux 8 1.16.1-7.el8_10.7

almalinux advisories ALSA-2026:59133ALSA-2026:59152ALSA-2026:59179

  • gstreamer1-plugins-good Rocky Linux 9 1.22.12-7.el9_8.8
  • gstreamer1-plugins-good Rocky Linux 8 1.16.1-7.el8_10.7

rocky linux advisories RLSA-2026:59152RLSA-2026:59179

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-2026-18295 updated cvss 8.8

gstreamer-plugins-good: GStreamer: Remote code execution via MRF file parsing

  • Red Hat Enterprise Linux 8 mingw-gstreamer1-plugins-good, mingw32-gstreamer1-plugins-good, mingw64-gstreamer1-plugins-good
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) gstreamer1-plugins-good 1.16.1-7.el8_10.7, gstreamer1-plugins-good-gtk 1.16.1-7.el8_10.7
    fixed: vendor fix RHSA-2026:59179
  • Red Hat Enterprise Linux AppStream (v. 9) gstreamer1-plugins-good 1.22.12-7.el9_8.8, gstreamer1-plugins-good-gtk 1.22.12-7.el9_8.8
    fixed: vendor fix RHSA-2026:59152
  • Red Hat Enterprise Linux AppStream (v. 10) gstreamer1-plugins-good 1.26.7-2.el10_2.7, gstreamer1-plugins-good-gtk 1.26.7-2.el10_2.7
    fixed: vendor fix RHSA-2026:59133
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) gstreamer1-plugins-good 1.16.1-4.el8_4.5, gstreamer1-plugins-good-gtk 1.16.1-4.el8_4.5
    fixed: vendor fix RHSA-2026:73424
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) gstreamer1-plugins-good 1.16.1-4.el8_6.6, gstreamer1-plugins-good-gtk 1.16.1-4.el8_6.6
    fixed: vendor fix RHSA-2026:72482
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) gstreamer1-plugins-good 1.16.1-5.el8_8.6, gstreamer1-plugins-good-gtk 1.16.1-5.el8_8.6
    fixed: vendor fix RHSA-2026:73040
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) gstreamer1-plugins-good 1.18.4-8.el9_2.6, gstreamer1-plugins-good-gtk 1.18.4-8.el9_2.6
    fixed: vendor fix RHSA-2026:71646
show 9 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) gstreamer1-plugins-good 1.22.1-4.el9_4.6, gstreamer1-plugins-good-gtk 1.22.1-4.el9_4.6
    fixed: vendor fix RHSA-2026:71647
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) gstreamer1-plugins-good 1.24.11-1.el10_0.7, gstreamer1-plugins-good-gtk 1.24.11-1.el10_0.7
    fixed: vendor fix RHSA-2026:71650
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) gstreamer1-plugins-good 1.22.12-5.el9_6.6, gstreamer1-plugins-good-gtk 1.22.12-5.el9_6.6
    fixed: vendor fix RHSA-2026:71648
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) gstreamer1-plugins-good 1.16.1-4.el8_4.5, gstreamer1-plugins-good-gtk 1.16.1-4.el8_4.5
    fixed: vendor fix RHSA-2026:73424
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) gstreamer1-plugins-good 1.16.1-4.el8_6.6, gstreamer1-plugins-good-gtk 1.16.1-4.el8_6.6
    fixed: vendor fix RHSA-2026:72482
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) gstreamer1-plugins-good 1.16.1-5.el8_8.6, gstreamer1-plugins-good-gtk 1.16.1-5.el8_8.6
    fixed: vendor fix RHSA-2026:73040
  • Red Hat Enterprise Linux Server (v. 7 ELS) gstreamer1-plugins-good 1.10.4-4.el7_9.6
    fixed: vendor fix RHSA-2026:72367
  • Red Hat Enterprise Linux 6 gstreamer-plugins-good Red Hat Enterprise Linux 7 gstreamer-plugins-good
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 10 snapshot 46.3-1.el10
    not affected: component 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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • GStreamer GStreamer

Classification

Weakness

References

Sources

Fencer Vulns 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.