SEPTEMBER 20, 2026
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Case File

CVE-2026-66039

HIGH · CVSS 8.8 EPSS 0.31% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-24 · Last synced 2026-08-23

CyberRota Analysis

AI-Generated

FFmpeg versions up to 8.1.2 are vulnerable to a signed integer overflow in the MACE6 audio decoder, which can be exploited by attackers using specially crafted CAF files to corrupt heap memory. This vulnerability allows for heap out-of-bounds writes, potentially leading to arbitrary code execution. Organizations using FFmpeg for audio processing should prioritize patching to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-66039
Severity
HIGH
CVSS
8.8
EPSS
0.31%

Original NVD Description

FFmpeg through 8.1.2, fixed in commit aafb5c6, contains a signed integer overflow vulnerability in the MACE6 audio decoder that allows attackers to corrupt heap memory by supplying a crafted CAF file with a malicious bytes_per_packet value. Attackers can craft a CAF file with oversized bytes_per_packet and frames_per_packet values in the desc chunk to trigger an integer overflow in mace_decode_frame() during output sample count computation, resulting in an undersized buffer allocation and heap out-of-bounds write that could enable code execution.

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