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CVE-2026-65706

7.8 · HIGH

FFmpeg versions 3.0 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_swaprect video filter that allows attackers to corrupt heap memory by supplying a crafted NV12 video frame w…

Published Jul 23, 2026CWE-131EPSS 0.19%

Overview

CVE-2026-65706 is a high-severity vulnerability. It was published on July 23, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

FFmpeg versions 3.0 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_swaprect video filter that allows attackers to corrupt heap memory by supplying a crafted NV12 video frame with odd width dimensions. The filter_frame() function reuses a temporary row buffer sized for plane 0's single-byte pixel step across all planes, causing an 18-byte memcpy into a 17-byte heap allocation when processing the two-byte-per-sample interleaved chroma plane of a 17x16 NV12 frame, resulting in heap corruption and process crash with potential for code execution.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcode.ffmpeg.org/FFmpeg/FFmpeg/commit/a7e38b617b32f996beaa371bbf04b39907d7a527Refcode.ffmpeg.org/FFmpeg/FFmpeg/pulls/23779Refwww.vulncheck.com/advisories/ffmpeg-vf-swaprect-out-of-bounds-write-via-nv12-frame-processing

How CyberStrike helps

Frequently asked questions

What is CVE-2026-65706?

CVE-2026-65706 is a high-severity vulnerability. It was published on July 23, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-65706?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-65706?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-65706?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-65706 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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