High severity · published Aug 20, 2026
CVE-2026-18295
GStreamer MRF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GS
GStreamer · GStreamer
13fcb641ed33d1472e4ffdec2846180b15405053 · source: vendor, NVD
In the news
VulnerabilityHigh
ZDI-26-463: 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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-18295.
Jul 29, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18295
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-18295
Patch
https://gstreamer.freedesktop.org/security/sa-2026-0050.html
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-26-463/
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