Is there a public exploit for CVE-2026-125263?

No public exploit for CVE-2026-125263 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-125263?

CVE-2026-125263 scores CVSS 5.7 (v4.0), rated medium.

What does CVE-2026-125263 affect?

CVE-2026-125263 affects FFMPEG FFmpeg.

5.7 Medium

FFmpeg 9.0 through 9.0.2 built with liblcevcdec fails to validate LCEVC enhanced output dimensions against maxpixels in libavcodec/decode.c…

CVE-2026-125263

FFmpeg 9.0 through 9.0.2 built with liblcevcdec fails to validate LCEVC enhanced output dimensions against maxpixels in libavcodec/decode.c before frame allocation. Attackers can supply crafted H.264, HEVC or VVC streams declaring huge LCEVC resolutions to force oversized getbuffer2() allocations and exhaust memory.

Assessment

CVSS: 5.7 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 9 November 2026
Last updated: 9 November 2026
Affected: FFMPEG · FFmpeg
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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