Use of Uninitialized Resource Affecting ffmpeg package, versions [0.5,0.9)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-FFMPEG-18599384
- published9 Aug 2026
- disclosed7 Aug 2026
- creditAdrian Junge
Introduced: 7 Aug 2026
NewCVE-2026-70631 (opens in a new tab)How to fix?
Upgrade ffmpeg to version 0.9 or higher.
Overview
Affected versions of this package are vulnerable to Use of Uninitialized Resource via the tiff_unpack_zlib() function in libavcodec/tiff.c. An attacker can expose stale heap contents in decoded TIFF image output by supplying a crafted Deflate-compressed strip that decompresses successfully but produces fewer bytes than the strip length the decoder later copies. This can leak data from prior heap allocations to anyone who receives the rendered image from a persistent FFmpeg service.