Critical 9.8Published Oct 8, 2026

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

Updated under an hour ago (Oct 28, 2026, 8:40 AM ET)

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It affects jtescher image_optimizer. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 1.66%, higher than 76% of scored CVEs.

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Every CVE for jtescher image_optimizer

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 1.66% (percentile 76)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

jtescher image_optimizer jtescher:image_optimizer (from the name)	from 1.3.0 through 1.9.0	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.