Medium severity · published Oct 8, 2026
CVE-2026-107660
FFmpeg before 8.1.3 and 9.x before 9.0.2 mbedTLS Hostname Verification Bypass for IP Hosts
4.8
CVSS
0.1%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FF
FFmpeg · FFmpeg
before 8.1.3; 9.0 before 9.0.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-107660
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-107660
patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24383
patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/57a2e704b4a6eda5d061b45aacde6b19c026bfc0
patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/d377212904a19fc740d721cbda0ba58fa3805a29
patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/0cd2a70eacd510c2efed48b9fc177c7cb2bc549f
technical-description
https://github.com/FFmpeg/FFmpeg/blob/n9.0.1/libavformat/tls_mbedtls.c#L676-L681
product
https://ffmpeg.org/
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