CVE-2026-42258

MEDIUM EPSS 40.4%
Published May 9, 20261mo ago · Modified Jun 17, 20262w ago
5.8 CVSS 4.0
Medium
Find Similar
Published May 9, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.8
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
40.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-77 Command Injection Injection
CWE-93

Affected Products 3

VendorProductVersionRange
ruby-langnet\\ <0.4.24
ruby-langnet\\≥0.5.0  –  <0.5.14
ruby-langnet\\≥0.6.0  –  <0.6.4

References 4

  • github.com https://github.com/ruby/net-imap/releases/tag/v0.4.24
    Release Notes
  • github.com https://github.com/ruby/net-imap/releases/tag/v0.5.14
    Release Notes
  • github.com https://github.com/ruby/net-imap/releases/tag/v0.6.4
    Release Notes
  • github.com https://github.com/ruby/net-imap/security/advisories/GHSA-75xq-5h9v-w6px
    MitigationVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.