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CVE-2026-30754

HIGH
8.8
CVSS Score
Published: September 8, 2026 at 12:00 AM UTC
Updated: October 15, 2026 at 07:25 PM UTC
1 product affected across 1 vendorFFMPEG

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Severity
HIGH8.8
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FFMPEG· Ffmpeg
95%
v < 8.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Issue TrackingPatch
Source: cverecord
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746
Exploit
Source: cverecord
https://github.com/momo-trip/poc_ffmpeg
Third Party Advisory
Source: cverecord
https://gist.github.com/momo-trip/4cddf2c9e15600873de55259dac6b0e6

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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