Red Hat Security Advisory: ruby:3.3 security update
Multiple security vulnerabilities have been identified in the Ruby 3.3 module related to the Net::IMAP library. These include a denial of service via crafted IMAP responses, IMAP command injection through symbol arguments, and information disclosure by bypassing TLS via man-in-the-middle attacks. Red Hat has issued an important security update for Ruby 3.3 on Red Hat Enterprise Linux 8 to address these issues.
AI Analysis
Technical Summary
This advisory covers three vulnerabilities in Ruby's Net::IMAP implementation: CVE-2026-42245 allows denial of service through crafted IMAP responses; CVE-2026-42258 enables IMAP command injection via symbol arguments; and CVE-2026-42246 permits information disclosure by bypassing TLS protections through man-in-the-middle attacks. Red Hat has released an update for the Ruby 3.3 module on Red Hat Enterprise Linux 8 to remediate these issues. The advisory references specific bugzilla entries and provides updated package versions for affected architectures.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial of service conditions, unauthorized command execution within the IMAP protocol context, and exposure of sensitive information by circumventing TLS encryption. These impacts affect applications using Ruby's Net::IMAP library for email communication, potentially compromising confidentiality and availability.
Mitigation Recommendations
Red Hat has released an official security update for the Ruby 3.3 module on Red Hat Enterprise Linux 8 that addresses these vulnerabilities. Users should apply the update as detailed in the Red Hat advisory RHSA-2026:33515 and the referenced article https://access.redhat.com/articles/11258 to remediate these issues. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: ruby:3.3 security update
Description
Multiple security vulnerabilities have been identified in the Ruby 3.3 module related to the Net::IMAP library. These include a denial of service via crafted IMAP responses, IMAP command injection through symbol arguments, and information disclosure by bypassing TLS via man-in-the-middle attacks. Red Hat has issued an important security update for Ruby 3.3 on Red Hat Enterprise Linux 8 to address these issues.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers three vulnerabilities in Ruby's Net::IMAP implementation: CVE-2026-42245 allows denial of service through crafted IMAP responses; CVE-2026-42258 enables IMAP command injection via symbol arguments; and CVE-2026-42246 permits information disclosure by bypassing TLS protections through man-in-the-middle attacks. Red Hat has released an update for the Ruby 3.3 module on Red Hat Enterprise Linux 8 to remediate these issues. The advisory references specific bugzilla entries and provides updated package versions for affected architectures.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial of service conditions, unauthorized command execution within the IMAP protocol context, and exposure of sensitive information by circumventing TLS encryption. These impacts affect applications using Ruby's Net::IMAP library for email communication, potentially compromising confidentiality and availability.
Mitigation Recommendations
Red Hat has released an official security update for the Ruby 3.3 module on Red Hat Enterprise Linux 8 that addresses these vulnerabilities. Users should apply the update as detailed in the Red Hat advisory RHSA-2026:33515 and the referenced article https://access.redhat.com/articles/11258 to remediate these issues. 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-2026:33515
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-42246","CVE-2026-42258"]
- Cvss Version
- null
Threat ID: 6a4452de27e9c797198e0963
Added to database: 06/30/2026, 23:35:58 UTC
Last enriched: 06/30/2026, 23:45:14 UTC
Last updated: 07/01/2026, 02:51:10 UTC
Views: 2
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