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.
Critical 9.8
CVE-2026-107704
jtescher image_optimizer — command injection.
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…
WeaknessCWE-78: Command injection
Published Updated Source NVD
CVSS 3.1
9.8
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit chance, 30 days
2.0%
Higher than 81% of all CVEs (EPSS)
Status
No known exploitation
Not in CISA KEV
Patch
Unknown
Check the vendor advisory
What happened
What to do
- 01Check whether you run jtescher image_optimizer, and which version.
- 02Follow the vendor advisory for a fix or a workaround.
References
Timeline · UTC
- Published to NVD
- NVD record updated
Also actively exploited