CVE-2026-107704
Critical
Description
The image_optimizer Ruby gem 1.3.0 through 1.9.0 contains an OS command injection vulnerability in ImageOptimizer#identify_format that allows attackers to execute commands by supplying a crafted image path when the identify option is enabled. Attackers controlling the path, such as an uploaded file name, can append shell metacharacters like ';' that are executed via Ruby backticks with the Ruby process privileges.
SeverityCritical
CVSS9.8
Exploit probability—
ProductJtescher Image Optimizer
PublishedOct 8, 2026
First seenOct 8, 2026
Weakness typeCWE-78OS command injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| jtescher image_optimizer | 1.3.0 ≤ v ≤ 1.9.0 | — |
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