CVE-2026-107704CWE-78command-injection

CVE-2026-107704

Critical · published October 8, 2026

CVSS v3.1
9.8
EPSS
2%
Percentile
76.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.01663 · 76.5th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-10-08T23:17Z
References (6)
https://gist.github.com/R3tro16/a99a058d24a06692721a6a3fade9649d · [email protected]https://github.com/jtescher/image_optimizer · [email protected]https://github.com/jtescher/image_optimizer/blob/v1.9.0/lib/image_optimizer.rb#L37-L47 · [email protected]https://github.com/jtescher/image_optimizer/blob/v1.9.0/lib/image_optimizer/shell.rb#L30-L32 · [email protected]https://www.vulncheck.com/advisories/image-optimizer-1.3.0-through-1.9.0-os-command-injection-via-identify-format · [email protected]https://gist.github.com/R3tro16/a99a058d24a06692721a6a3fade9649d · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 10 OCT 03:27Z
    EPSS moved — → 2%
    epss
  • 08 OCT 18:36Z
    image_optimizer 1.3.0 through 1.9.0 OS Command Injection via identify_format
    cvelistv5
  • 08 OCT 18:36Z
    image_optimizer 1.3.0 through 1.9.0 OS Command Injection via identify_format
    cvelistv5