CVE-2026-30754
FFmpeg RTP Encoding Memory Corruption
Description
A memory corruption vulnerability exists in FFmpeg before 8.1. The RTP encoding process. In the nal_send function in libavformat/rtpenc_h264_hevc.c, a negative size parameter (size=-3) is passed to memcpy when transmitting H.264/HEVC streams via RTP using a crafted input file. This was detected using AddressSanitizer.
INFO
Published Date :
Sept. 8, 2026, 9:17 p.m.
Last Modified :
Oct. 15, 2026, 7:25 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update FFmpeg to version 8.1 or later.
- Apply relevant patches if updating is not possible.
- Validate RTP stream transmission integrity.
- Avoid processing untrusted input files.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-30754.
| URL | Resource |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746 | Issue Tracking Patch |
| https://gist.github.com/momo-trip/4cddf2c9e15600873de55259dac6b0e6 | Third Party Advisory |
| https://github.com/momo-trip/poc_ffmpeg | Exploit |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-30754 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-30754
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-30754 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-30754 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 15, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:* versions up to (excluding) 8.1 Added Reference Type MITRE: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746 Types: Issue Tracking, Patch Added Reference Type MITRE: https://gist.github.com/momo-trip/4cddf2c9e15600873de55259dac6b0e6 Types: Third Party Advisory Added Reference Type MITRE: https://github.com/momo-trip/poc_ffmpeg Types: Exploit -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 09, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-787 Added SSVC {'id': 'CVE-2026-30754', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-09T15:16:35.323659Z'} -
New CVE Received by [email protected]
Sep. 08, 2026
Action Type Old Value New Value Added Description A memory corruption vulnerability exists in FFmpeg before 8.1. The RTP encoding process. In the nal_send function in libavformat/rtpenc_h264_hevc.c, a negative size parameter (size=-3) is passed to memcpy when transmitting H.264/HEVC streams via RTP using a crafted input file. This was detected using AddressSanitizer. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/30xxx/CVE-2026-30754.json">CVE-2026-30754</a> Added Reference https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746 Added Reference https://gist.github.com/momo-trip/4cddf2c9e15600873de55259dac6b0e6 Added Reference https://github.com/momo-trip/poc_ffmpeg