CVE-2026-70628: Ffmpeg

High severity, CVSS 7.8. EPSS: 0.1% chance of exploitation in the next 30 days.

FFmpeg versions from 0.5 up to, but not including, 9.0 contain a signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsub_parser.c that allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow causes the bounds-check guard expression to wrap to INT_MIN, bypassing the PARSE_BUF_SIZE comparison and invoking memcpy() with attacker-controlled data into a heap buffer, resulting in an out-of-bounds heap write and potential memory corruption or code execution.

Affected products

• Ffmpeg Ffmpeg: from 0.5, before 9 (fixed in 9)

Published 2026-08-06. Last modified 2026-09-01.