CVE-2026-8461Network attack vector

Code execution via unchecked MagicYUV slice geometry

Published Jun 18, 2026 · Updated Jun 18, 2026

Out-of-bounds write in FFmpeg before 8.1.2 allows remote attackers to crash the process or execute code via crafted MagicYUV video. The decoder accepts slice heights misaligned with chroma subsampling or too short for prediction, causing slice processing to access memory outside frame arrays. User interaction is required to process the video, and resulting code runs with the privileges of the affected process.

CVSS severity8.8
High
EPSS probability1.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in FFmpeg before 8.1.2 allows remote attackers to crash the process or execute code via crafted MagicYUV video. The decoder accepts slice heights misaligned with chroma subsampling or too short for prediction, causing slice processing to access memory outside frame arrays. User interaction is required to process the video, and resulting code runs with the privileges of the affected process.

The record

CVE
CVE-2026-8461
Published
Jun 18, 2026
Updated
Jun 18, 2026
Vendor
FFmpeg
Product
FFmpeg
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <8.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FFmpeg · FFmpegversion=0 <8.1.2

Published CVSS scores

8.8redhat-SADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8JFrogCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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