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Vulnerability · Published Mar 13, 2026 · Assigned by zdi

CVE-2026-3086GStreamer H.266 Codec Parser Out-Of-Bounds Write Remote Code Execution Vulnerability

High 7.8

In plain English

A high-severity out-of-bounds write in GStreamer from GStreamer. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.4%top 60.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

GStreamer H.266 Codec Parser Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the processing of APS units. 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-28911.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13gst-plugins-bad1.01.26.2-3+deb13u1DEBIAN-CVE-2026-3086
Debian:14gst-plugins-bad1.01.28.1-1DEBIAN-CVE-2026-3086
Ubuntu:25.10gst-plugins-bad1.0no fix listedUBUNTU-CVE-2026-3086

Affected products (as reported)

VendorProductVersions
GStreamer GStreamer 1c6e163aa33962f5ee4a87d29319ccdd5cb67612

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References