Summary
Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.
Security Fix(es):
* ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses (CVE-2026-42245)
* ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258)
* net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS (CVE-2026-42246)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 11
| Release | Package | Fixed in |
|---|---|---|
| Rocky Linux · 8 | rubygem-abrt | 0:0.4.0-1.module+el8.9.0+1537+0b2034bd |
| Rocky Linux · 8 | rubygem-abrt | 0:0.4.0-1.module+el8.10.0+1679+61871737 |
| Rocky Linux · 8 | rubygem-abrt | 0:0.4.0-1.module+el8.10.0+1741+bdb5b6ca |
| Rocky Linux · 8 | rubygem-abrt | 0:0.4.0-1.module+el8.10.0+1827+16ecb9d2 |
| Rocky Linux · 8 | rubygem-abrt | 0:0.4.0-1.module+el8.5.0+668+665814fa |
| Rocky Linux · 8 | rubygem-abrt | 0:0.4.0-1.module+el8.10.0+1820+f3fffb92 |
| Rocky Linux · 8 | rubygem-abrt | 0:0.4.0-1.module+el8.10.0+1826+b62220b4 |
| Rocky Linux · 8 | rubygem-mysql2 | 0:0.5.5-1.module+el8.10.0+1679+61871737 |
| Rocky Linux · 8 | rubygem-mysql2 | 0:0.5.5-1.module+el8.10.0+1827+16ecb9d2 |
| Rocky Linux · 8 | rubygem-pg | 0:1.5.4-1.module+el8.10.0+1679+61871737 |
| Rocky Linux · 8 | rubygem-pg | 0:1.5.4-1.module+el8.10.0+1827+16ecb9d2 |
Vulnerabilities 3
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High 7.6
net-imap vulnerable to STARTTLS stripping via invalid response timing
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issu…
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Medium 5.8
net-imap: Command Injection via unvalidated Symbol inputs
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 IMA…
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Low 2.3
net-imap: Quadratic complexity when reading response literals
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, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hos…