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Medium severity6.5GHSA Advisory· Published May 9, 2026· Updated May 18, 2026

CVE-2026-42256

CVE-2026-42256

Description

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
net-imapRubyGems
>= 0.6.0, < 0.6.40.6.4
net-imapRubyGems
>= 0.5.0, < 0.5.140.5.14
net-imapRubyGems
>= 0.4.0, < 0.4.240.4.24

Affected products

74

Patches

Vulnerability mechanics

References

11

News mentions

1