Bug 2468499 (CVE-2026-42246) - CVE-2026-42246 net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS
Summary: CVE-2026-42246 net-imap: ruby: Net::IMAP: Information disclosure via man-in-t...
Keywords:
Status: NEW
Alias: CVE-2026-42246
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2492090
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-09 20:01 UTC by OSIDB Bzimport
Modified: 2026-07-01 08:17 UTC (History)
15 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:33462 0 None None None 2026-06-30 10:49:30 UTC
Red Hat Product Errata RHSA-2026:33512 0 None None None 2026-06-30 15:36:01 UTC
Red Hat Product Errata RHSA-2026:33514 0 None None None 2026-06-30 15:26:38 UTC
Red Hat Product Errata RHSA-2026:33515 0 None None None 2026-06-30 16:11:27 UTC
Red Hat Product Errata RHSA-2026:33540 0 None None None 2026-06-30 15:28:38 UTC
Red Hat Product Errata RHSA-2026:33565 0 None None None 2026-06-30 16:05:49 UTC
Red Hat Product Errata RHSA-2026:33576 0 None None None 2026-06-30 17:12:39 UTC
Red Hat Product Errata RHSA-2026:33577 0 None None None 2026-06-30 18:13:33 UTC
Red Hat Product Errata RHSA-2026:33630 0 None None None 2026-06-30 17:07:47 UTC
Red Hat Product Errata RHSA-2026:34076 0 None None None 2026-07-01 08:17:08 UTC

Description OSIDB Bzimport 2026-05-09 20:01:28 UTC 
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.
Comment 5 errata-xmlrpc 2026-06-30 10:49:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:33462 https://access.redhat.com/errata/RHSA-2026:33462
Comment 6 errata-xmlrpc 2026-06-30 15:26:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:33514 https://access.redhat.com/errata/RHSA-2026:33514
Comment 7 errata-xmlrpc 2026-06-30 15:28:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:33540 https://access.redhat.com/errata/RHSA-2026:33540
Comment 8 errata-xmlrpc 2026-06-30 15:35:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:33512 https://access.redhat.com/errata/RHSA-2026:33512
Comment 9 errata-xmlrpc 2026-06-30 16:05:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:33565 https://access.redhat.com/errata/RHSA-2026:33565
Comment 10 errata-xmlrpc 2026-06-30 16:11:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:33515 https://access.redhat.com/errata/RHSA-2026:33515
Comment 11 errata-xmlrpc 2026-06-30 17:07:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:33630 https://access.redhat.com/errata/RHSA-2026:33630
Comment 12 errata-xmlrpc 2026-06-30 17:12:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:33576 https://access.redhat.com/errata/RHSA-2026:33576
Comment 13 errata-xmlrpc 2026-06-30 18:13:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:33577 https://access.redhat.com/errata/RHSA-2026:33577
Comment 14 errata-xmlrpc 2026-07-01 08:17:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:34076 https://access.redhat.com/errata/RHSA-2026:34076
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