CVE-2026-107660
MEDIUMCVSS 4.8Description
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.
Timeline
Published:October 8th, 2026 4:17 PM
Last modified:October 14th, 2026 11:56 PM
CVSS Scoring
CVSS v3: 4.8 (MEDIUM)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected Software
From NVD CPE configuration data
Vendors
ffmpeg
Products
ffmpeg
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/0cd2a70eacd510c2efed48b9fc177c7cb2bc549fPatch
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/57a2e704b4a6eda5d061b45aacde6b19c026bfc0Patch
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/d377212904a19fc740d721cbda0ba58fa3805a29Patch
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24383Issue Tracking
- https://ffmpeg.org/Product
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.1/libavformat/tls_mbedtls.c#L676-L681Product
- https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-and-9-x-before-9.0.2-mbedtls-hostname-verification-bypass-for-ip-hostsThird Party Advisory
Source: NIST NVD · Data may lag official sources by up to one minute