GStreamer H.266 Codec Parser Vulnerability in Remote Code Execution
CVE-2026-3086

7.8HIGH

Key Information:

Vendor

Gstreamer

Status
Gstreamer
Vendor
CVE Published:
13 March 2026

What is CVE-2026-3086?

The GStreamer H.266 Codec Parser is susceptible to an out-of-bounds write vulnerability, which allows remote attackers to execute arbitrary code. The flaw originates from improper validation of user-supplied data when processing APS units, leading to potential writes beyond allocated memory boundaries. An attacker exploiting this vulnerability could execute malicious code in the context of the affected application, posing significant risks to system integrity and confidentiality.

Affected Version(s)

GStreamer 1c6e163aa33962f5ee4a87d29319ccdd5cb67612

References

https://www.zerodayinitiative.com/advisories/ZDI-26-170/
x_research-advisory
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/comm...
vendor-advisory

CVSS V3.0

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.