MEDIUMCVSS 5.8EPSS 0.8%

CVE-2026-42258

CVE-2026-42258 updated by NVD

Published: 2026-05-04
Modified: 2026-07-26
EPSS percentile: 53%
Sources: github-advisory, nvd

Summary

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

Affected packages

Ecosystem	Package	Affected versions	Fixed versions
RubyGems	net-imap	—	0.6.4, 0.5.14, 0.4.24

Remediation: Upgrade to 0.6.4 or later.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-42258

Includes data from the GitHub Advisory Database, licensed under CC-BY 4.0.

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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EPSS scores provided by the FIRST.org Exploit Prediction Scoring System.