What’s Vulnerable › Vulnerabilities

CVE-2026-107704: image_optimizer 1.3.0 through 1.9.0 OS Command Injection via identify_format

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-08 · updated 2026-10-09
• Weakness: CWE-78

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.

Affected products

• jtescher image_optimizer: from 1.3.0 through 1.9.0

References

• https://gist.github.com/R3tro16/a99a058d24a06692721a6a3fade9649d
• https://github.com/jtescher/image_optimizer
• https://github.com/jtescher/image_optimizer/blob/v1.9.0/lib/image_optimizer.rb#L37-L47
• https://github.com/jtescher/image_optimizer/blob/v1.9.0/lib/image_optimizer/shell.rb#L30-L32
• https://www.vulncheck.com/advisories/image-optimizer-1.3.0-through-1.9.0-os-command-injection-via-identify-format
• https://gist.github.com/R3tro16/a99a058d24a06692721a6a3fade9649d

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