CVE-2026-30999 Memory corruption in n/a

High 7.5 Published 13 Apr 2026 Updated 13 Apr 2026

Attackers can cause a Denial of Service in FFmpeg via a crafted input triggering a heap buffer overflow in av_bprint_finalize.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-30999?

CVE-2026-30999 is a high-severity memory corruption vulnerability in Ffmpeg Ffmpeg, published on 13 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A heap buffer overflow in the av_bprint_finalize() function of FFmpeg v8.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted input.

Weakness: CWE-122

Which versions are affected by CVE-2026-30999?

It affects 1 product.

Products include Ffmpeg Ffmpeg.

How do I fix CVE-2026-30999?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-30999 being exploited?

There is no known exploitation of CVE-2026-30999 in the wild and no public exploit code.

All Ffmpeg Ffmpeg vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-30999, ECHO-8cbe-edcd-eee7, GHSA-jj28-p98r-mwqj, JLSEC-2026-651, MINI-3hv9-48fj-46p2, UBUNTU-CVE-2026-30999.