Red Hat Security Advisory: ruby4.0 security update
Multiple security vulnerabilities have been identified in the Ruby net-imap library affecting Red Hat Enterprise Linux 10. These include a denial of service via crafted IMAP responses, an IMAP command injection via symbol arguments, and information disclosure through a man-in-the-middle attack bypassing TLS. Red Hat has issued an important security update (RHSA-2026:33540) addressing these issues. The update is available for various Red Hat Enterprise Linux 10 variants and related products. Users are advised to apply the update as detailed in the Red Hat advisory to mitigate these vulnerabilities.
AI Analysis
Technical Summary
This advisory covers three security vulnerabilities in the Ruby net-imap library: CVE-2026-42245 (Denial of Service via crafted IMAP responses), CVE-2026-42258 (IMAP Command Injection via Symbol Arguments), and CVE-2026-42246 (Information disclosure via man-in-the-middle attack bypassing TLS). These vulnerabilities affect Ruby 4.0 packages distributed with Red Hat Enterprise Linux 10 and related products. Red Hat has released updated ruby4.0 packages to address these issues as part of advisory RHSA-2026:33540. The advisory provides details on affected products and instructions for applying the update.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to cause a denial of service on applications using the Ruby net-imap library, inject commands via IMAP symbol arguments, or disclose sensitive information by bypassing TLS protections in man-in-the-middle scenarios. This could impact the confidentiality, integrity, and availability of systems running vulnerable Ruby net-imap versions on Red Hat Enterprise Linux 10.
Mitigation Recommendations
Red Hat has released updated ruby4.0 packages that fix these vulnerabilities as part of advisory RHSA-2026:33540. Users should apply the security update promptly by following the instructions at https://access.redhat.com/articles/11258. The update is available for Red Hat Enterprise Linux 10 and its variants. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: ruby4.0 security update
Description
Multiple security vulnerabilities have been identified in the Ruby net-imap library affecting Red Hat Enterprise Linux 10. These include a denial of service via crafted IMAP responses, an IMAP command injection via symbol arguments, and information disclosure through a man-in-the-middle attack bypassing TLS. Red Hat has issued an important security update (RHSA-2026:33540) addressing these issues. The update is available for various Red Hat Enterprise Linux 10 variants and related products. Users are advised to apply the update as detailed in the Red Hat advisory to mitigate these vulnerabilities.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers three security vulnerabilities in the Ruby net-imap library: CVE-2026-42245 (Denial of Service via crafted IMAP responses), CVE-2026-42258 (IMAP Command Injection via Symbol Arguments), and CVE-2026-42246 (Information disclosure via man-in-the-middle attack bypassing TLS). These vulnerabilities affect Ruby 4.0 packages distributed with Red Hat Enterprise Linux 10 and related products. Red Hat has released updated ruby4.0 packages to address these issues as part of advisory RHSA-2026:33540. The advisory provides details on affected products and instructions for applying the update.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to cause a denial of service on applications using the Ruby net-imap library, inject commands via IMAP symbol arguments, or disclose sensitive information by bypassing TLS protections in man-in-the-middle scenarios. This could impact the confidentiality, integrity, and availability of systems running vulnerable Ruby net-imap versions on Red Hat Enterprise Linux 10.
Mitigation Recommendations
Red Hat has released updated ruby4.0 packages that fix these vulnerabilities as part of advisory RHSA-2026:33540. Users should apply the security update promptly by following the instructions at https://access.redhat.com/articles/11258. The update is available for Red Hat Enterprise Linux 10 and its variants. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:33540
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-42246","CVE-2026-42258"]
- Cvss Version
- null
Threat ID: 6a4452de27e9c797198e095b
Added to database: 06/30/2026, 23:35:58 UTC
Last enriched: 06/30/2026, 23:45:08 UTC
Last updated: 07/01/2026, 02:51:10 UTC
Views: 2
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