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CVE-2026-42258

9.8 CRITICAL

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby

Published: 2026-05-09 · Last updated: 2026-05-18

Severity and scoring

CVSS
9.8 CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-77, CWE-93

Affected products

VendorProduct
ruby-langnet\

Description

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.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-46727 — An issue was discovered in Ruby 4 before 4.0.5 (8.1 HIGH)
  • CVE-2026-42257 — Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby (9.8 CRITICAL)
  • CVE-2026-42256 — Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby (6.5 MEDIUM)
  • CVE-2026-42246 — Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby (7.4 HIGH)
  • CVE-2026-42245 — Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby (7.5 HIGH)

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