What is CVE-2018-12459?

CVE-2018-12459 is a medium-severity vulnerability in Ffmpeg, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2018-06-15.

How severe is CVE-2018-12459?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2018-12459 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Ffmpeg

CVE-2018-12459

An inconsistent bits-per-sample value in the ff_mpeg4_decode_picture_header function in libavcodec/mpeg4videodec.c in FFmpeg 4.0 may trigger an assertion violation while converting a crafted AVI file to MPEG4, leading to a denial of service.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Ffmpeg — versions 4.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

aflsmart/aflsmart

References

github.com/FFmpeg/FFmpeg/commit/2fc108f60f98cd00813418a8754a46476b404a3c (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-12459?: CVE-2018-12459 is a medium-severity vulnerability in Ffmpeg, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2018-06-15.
How severe is CVE-2018-12459?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2018-12459 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.