CVE-2026-110649: Stills before 25.24.2 OS Command Injection via Media File Names

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-14 · updated 2026-10-16
Weakness: CWE-78

Description

Stills before 25.24.2 contains an OS command injection vulnerability that allows attackers to execute shell commands by supplying crafted media file paths. Attackers can name a media file with $(...) or backticks to execute operating system commands with Node.js process privileges when ffmpeg, ffprobe, gifsicle, or convert runs.

Affected products

shahkashani stills: before 25.24.2 — fixed in 25.24.2

How to fix

Upgrade to a fixed version: shahkashani stills 25.24.2. Check the vendor advisory for mitigations.

References

https://github.com/shahkashani/stills/blob/66d5def1265b817d84524473a2813e4781dcbd80/lib/content/video.js#L58-L60
https://github.com/shahkashani/stills/blob/66d5def1265b817d84524473a2813e4781dcbd80/lib/stills/frames.js#L106-L108
https://github.com/shahkashani/stills/commit/51ba953983ba99915331607bf8530e6089952253
https://github.com/shahkashani/stills/commit/5694b3b0dcd2da342f4f0497244129d4c9eb73bc
https://github.com/shahkashani/stills/pull/29
https://github.com/shahkashani/stills/pull/30
https://www.vulncheck.com/advisories/stills-before-25.24.2-os-command-injection-via-media-file-names

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