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GHSA-qrqm-fpv6-6r8g

HighCVSS 7.4 / 10
Published Feb 2, 2021·Last modified Mar 13, 2026
Affected Components(0)

No affected components available

Description

This security advisory has been created for public disclosure of a Command Injection vulnerability that was responsibly reported by @kyoshidajp (Katsuhiko YOSHIDA).

Impact

Mechanize >= v2.0, < v2.7.7 allows for OS commands to be injected using several classes' methods which implicitly use Ruby's Kernel.open method. Exploitation is possible only if untrusted input is used as a local filename and passed to any of these calls:

  • Mechanize::CookieJar#load: since v2.0 (see 208e3ed)
  • Mechanize::CookieJar#save_as: since v2.0 (see 5b776a4)
  • Mechanize#download: since v2.2 (see dc91667)
  • Mechanize::Download#save and #save! since v2.1 (see 98b2f51, bd62ff0)
  • Mechanize::File#save and #save_as: since v2.1 (see 2bf7519)
  • Mechanize::FileResponse#read_body: since v2.0 (see 01039f5)

Patches

These vulnerabilities are patched in Mechanize v2.7.7.

Workarounds

No workarounds are available. We recommend upgrading to v2.7.7 or later.

References

See https://docs.rubocop.org/rubocop/cops_security.html#securityopen for background on why Kernel.open should not be used with untrusted input.

For more information

If you have any questions or comments about this advisory, please open an issue in sparklemotion/mechanize.

Risk Scores
Base Score
7.4

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the integrity of the data.

Threat Intelligence
6.8

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
3.51%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity
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