CVE-2025-27219

ADVISORY - github

Summary

There is a possibility for DoS by in the cgi gem. This vulnerability has been assigned the CVE identifier CVE-2025-27219. We recommend upgrading the cgi gem.

Details

CGI::Cookie.parse took super-linear time to parse a cookie string in some cases. Feeding a maliciously crafted cookie string into the method could lead to a Denial of Service.

Please update CGI gem to version 0.3.5.1, 0.3.7, 0.4.2 or later.

Affected versions

cgi gem versions <= 0.3.5, 0.3.6, 0.4.0 and 0.4.1.

Credits

Thanks to lio346 for discovering this issue. Also thanks to mame for fixing this vulnerability.

EPSS Score⁠: 0.00712 (0.715)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-770⁠

Allocation of Resources Without Limits or Throttling

ADVISORY - github

CWE-400⁠

Uncontrolled Resource Consumption

CWE-770⁠

Allocation of Resources Without Limits or Throttling

ADVISORY - gitlab

CWE-1035⁠

OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities

CWE-400⁠

Uncontrolled Resource Consumption

CWE-770⁠

Allocation of Resources Without Limits or Throttling

CWE-937⁠

OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities

ADVISORY - redhat

CWE-770⁠

Allocation of Resources Without Limits or Throttling

Impacted images

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