CVE-2026-111183: Heap-Based Buffer Overflow Flaw in GStreamer Scores 9.8 on CVSS

GStreamer is affected by CVE-2026-111183, a heap-based buffer overflow that the National Vulnerability Database rates 9.8 out of 10.

At a glance

CVE

CVE-2026-111183

Product

GStreamer

CVSS

9.8 Critical

Weakness

heap-based buffer overflow

Exploited

No known exploitation

What is the vulnerability?

The NVD entry states: GStreamer rtpL16depay Heap-based Buffer Overflow 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 RTP payload elements. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-31143.

Affected versions

CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is it being exploited?

There is no public confirmation of exploitation at the time of publication. It does not appear in CISA's Known Exploited Vulnerabilities catalog. We will update this report if that changes.

What should you do?

• Identify whether the affected product and versions run in your environment.
• Apply the vendor update listed in the advisory as soon as it is available.
• Limit network exposure of the affected service until it is patched.
• Monitor the vendor advisory for updated guidance or exploitation reports.

What to do and how to stay safe: CVE-2026-111183

• Vulnerability severity scores ignore your specific architecture and context.
• Exploitability depends on network exposure and user behavior, not just code flaws.
• Prioritization requires continuous asset inventory and threat intelligence alignment.

Risk-based vulnerability management focuses your limited resources on the flaws that actually threaten your business. Start by mapping your critical assets and checking for active exploits to prioritize your backlog.

Step-by-step guide: Risk-Based Vulnerability Management: Prioritize Fixes by Actual Danger

General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.

Frequently asked questions

What is CVE-2026-111183?

CVE-2026-111183 is a heap-based buffer overflow vulnerability in GStreamer.

How severe is CVE-2026-111183?

It has a CVSS score of 9.8 Critical.

Is CVE-2026-111183 being exploited?

There is no public confirmation of exploitation at the time of publication.