CVE-2026-107660CWE-297

CVE-2026-107660

Medium · published October 8, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
2.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
6.3 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00136 · 2.7th percentile
Weakness
CWE-297 · Improper Validation of Certificate with Host Mismatch
Published
2026-10-08T20:17Z
Affected products (2)
ProductVersionsFixed in
ffmpeg/ffmpeg< 8.1.38.1.3
ffmpeg/ffmpeg≥ 9.0, < 9.0.29.0.2
References (7)
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/0cd2a70eacd510c2efed48b9fc177c7cb2bc549f · [email protected]https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/57a2e704b4a6eda5d061b45aacde6b19c026bfc0 · [email protected]https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/d377212904a19fc740d721cbda0ba58fa3805a29 · [email protected]https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24383 · [email protected]https://ffmpeg.org/ · [email protected]https://github.com/FFmpeg/FFmpeg/blob/n9.0.1/libavformat/tls_mbedtls.c#L676-L681 · [email protected]https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-and-9-x-before-9.0.2-mbedtls-hostname-verification-bypass-for-ip-hosts · [email protected]
EPSS history
Timeline
  • 10 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 08 OCT 15:28Z
    FFmpeg before 8.1.3 and 9.x before 9.0.2 mbedTLS Hostname Verification Bypass for IP Hosts
    cvelistv5
  • 08 OCT 15:28Z
    FFmpeg before 8.1.3 and 9.x before 9.0.2 mbedTLS Hostname Verification Bypass for IP Hosts
    cvelistv5