Red Hat Security Advisory: ruby:3.3 security update
Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks. Security Fix(es): * erb: ERB: Arbitrary code execution via deserialization bypass (CVE-2026-41316) * ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258) * net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS (CVE-2026-42246) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
This advisory covers several security flaws in Ruby as distributed with Red Hat Enterprise Linux 9.6 Extended Update Support and related products. The most critical vulnerability (CVE-2026-41316) involves arbitrary code execution through a deserialization bypass in the ERB component. Additional vulnerabilities include an IMAP command injection via symbol arguments (CVE-2026-42258) and an information disclosure vulnerability that allows a man-in-the-middle attack to bypass TLS protections (CVE-2026-42246). Red Hat has released updated Ruby packages to remediate these issues. The advisory references multiple bugzilla entries and provides updated package versions for various architectures and distributions.
Potential Impact
Successful exploitation of CVE-2026-41316 can lead to arbitrary code execution, compromising confidentiality, integrity, and availability of affected systems. CVE-2026-42258 allows injection of IMAP commands, potentially leading to unauthorized actions on mail servers. CVE-2026-42246 enables information disclosure by bypassing TLS protections in IMAP communications, exposing sensitive data to interception. These vulnerabilities collectively pose a high risk to systems running affected Ruby versions on Red Hat Enterprise Linux 9.6 Extended Update Support and related platforms.
Mitigation Recommendations
Red Hat has released updated Ruby packages that address these vulnerabilities. Users should apply the security update described in Red Hat Advisory RHSA-2026:33462 promptly. Detailed instructions for applying the update are available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
Red Hat Security Advisory: ruby:3.3 security update
Description
Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks. Security Fix(es): * erb: ERB: Arbitrary code execution via deserialization bypass (CVE-2026-41316) * ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258) * net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS (CVE-2026-42246) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
CVSS v3.1
Score 8.1high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers several security flaws in Ruby as distributed with Red Hat Enterprise Linux 9.6 Extended Update Support and related products. The most critical vulnerability (CVE-2026-41316) involves arbitrary code execution through a deserialization bypass in the ERB component. Additional vulnerabilities include an IMAP command injection via symbol arguments (CVE-2026-42258) and an information disclosure vulnerability that allows a man-in-the-middle attack to bypass TLS protections (CVE-2026-42246). Red Hat has released updated Ruby packages to remediate these issues. The advisory references multiple bugzilla entries and provides updated package versions for various architectures and distributions.
Potential Impact
Successful exploitation of CVE-2026-41316 can lead to arbitrary code execution, compromising confidentiality, integrity, and availability of affected systems. CVE-2026-42258 allows injection of IMAP commands, potentially leading to unauthorized actions on mail servers. CVE-2026-42246 enables information disclosure by bypassing TLS protections in IMAP communications, exposing sensitive data to interception. These vulnerabilities collectively pose a high risk to systems running affected Ruby versions on Red Hat Enterprise Linux 9.6 Extended Update Support and related platforms.
Mitigation Recommendations
Red Hat has released updated Ruby packages that address these vulnerabilities. Users should apply the security update described in Red Hat Advisory RHSA-2026:33462 promptly. Detailed instructions for applying the update are available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:20670
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- 3.1
Threat ID: 6a160980e29bf47b5064cc87
Added to database: 05/26/2026, 20:58:40 UTC
Last enriched: 07/19/2026, 23:23:31 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 58
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