CVE-2026-42258
CRITICAL WAF: High
CVSS 9.8
Published: 2026-05-09
CWE-77
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.
WAF Coverage Analysis
Command Injection
High WAF Coverage
OWASP: A03:2021 Injection
932xxx - Remote Code Execution
Affected Software
| Vendor | Product | Version |
|---|---|---|
| ruby-lang | net\ | up to 0.4.24 |
| ruby-lang | net\ | 0.5.0 - 0.5.14 |
| ruby-lang | net\ | 0.6.0 - 0.6.4 |
References
- github.com (Release Notes)
- github.com (Release Notes)
- github.com (Release Notes)
- github.com (Mitigation, Vendor Advisory)