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CVE-2026-42246

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CVE-2026-42246

Published: May 9, 2026

Modified: May 12, 2026

PUBLISHED

Description

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 issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.

VendorProductVersions

ruby

net-imap

affected
< 0.3.10
affected
>= 0.4.0, < 0.4.24
affected
>= 0.5.0, < 0.5.14
affected
>= 0.6.0, < 0.6.4

Weaknesses (CWE)

CWE-392
CWE-393
CWE-754
CWE-636
CWE-841

References

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