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CVE-2026-42256

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CVE-2026-42256

Published: May 9, 2026

Modified: May 11, 2026

PUBLISHED

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.

VendorProductVersions

ruby

net-imap

affected
>= 0.4.0, < 0.4.24
affected
>= 0.5.0, < 0.5.14
affected
>= 0.6.0, < 0.6.4

Weaknesses (CWE)

CWE-1322
CWE-770

References

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