Quick answers
- Is CVE-2026-8461 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-8461 being exploited in the wild.
- How severe is CVE-2026-8461?
- High severity, with a CVSS score of 8.8, published 18 June 2026.
- Which products and versions are affected?
- Ffmpeg < 8.1.2.
- Is there a fix for CVE-2026-8461?
- A patch was published on 2026-05-25: Fix merged into FFmpeg master branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-8461 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-8461?
- Check whether you run Ffmpeg at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An out-of-bounds write vulnerability (CWE-787) exists in FFmpeg's libavcodec/magicyuv.c due to a failure to properly validate slice_height alignment with chroma vshift. An attacker can exploit this by providing a maliciously crafted MagicYUV video file. When processed by the decoder, the misalignment leads to an out-of-array access. This can result in a denial-of-service (crash) or remote code execution under certain conditions. The issue is fixed in FFmpeg version 8.1.2 by rejecting slice_height values that are misaligned with chroma vertical shifting.
Affected products
- FFmpeg FFmpeg < 8.1.2
Timeline
- 2026-05-25: patched: Fix merged into FFmpeg master branch
- 2026-06-18: advisory: CVE published by JFrog/NVD