CVE-2026-107660

FFmpeg before 8.1.3 and 9.x before 9.0.2 contains an improper certificate validation vulnerability in tls_open() of libavformat/tls_mbedtls.c, which skips hostname checks for IP-address hosts. Network attackers can intercept https, rtmps, or tls connections to IP-literal URLs with any trusted CA-issued certificate to read and tamper with streams.

CVSS 4.0

6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

4.8CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS

0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)

CWE

CWE-297

Published

2026-10-08

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• ffmpeg:ffmpeg

References

• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/0cd2a70eacd510c2efed48b9fc177c7cb2bc549f
• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/57a2e704b4a6eda5d061b45aacde6b19c026bfc0
• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/d377212904a19fc740d721cbda0ba58fa3805a29
• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24383
• https://ffmpeg.org/

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