Bug 2468499 (CVE-2026-42246)
| Summary: | CVE-2026-42246 net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | akostadi, amasferr, dmayorov, eshamard, jkoehler, jlledo, jvasik, kaycoth, lphiri, pantinor, rblanco, rhel-process-autobot, sdawley, tsedmik, watson-tool-maintainers |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in the Ruby net-imap library. When upgrading a cleartext IMAP connection to TLS using the Net::IMAP#starttls method, the library improperly handles certain responses received during STARTTLS negotiation. A man-in-the-middle (MITM) attacker can inject a predicted tagged OK response before the client completes the STARTTLS command, causing the operation to appear successful without establishing a TLS session. As a result, the connection may continue to transmit sensitive information in cleartext and enable modification of data exchanged over the affected connection, while the application incorrectly believes that encryption has been enabled.
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2492090 | ||
| Bug Blocks: | |||
|
Description
OSIDB Bzimport
2026-05-09 20:01:28 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 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 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 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 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 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 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 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 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 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 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:35834 https://access.redhat.com/errata/RHSA-2026:35834 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Via RHSA-2026:35866 https://access.redhat.com/errata/RHSA-2026:35866 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Via RHSA-2026:35867 https://access.redhat.com/errata/RHSA-2026:35867 This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:35895 https://access.redhat.com/errata/RHSA-2026:35895 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Via RHSA-2026:36099 https://access.redhat.com/errata/RHSA-2026:36099 |