Summary
[4.0.3-35]
- Fix Net::IMAP ResponseReader quadratic complexity vulnerability (CVE-2026-42245)
Includes core fix plus additional performance optimizations
Resolves: RHEL-181675
- Fix Net::IMAP STARTTLS stripping vulnerability (CVE-2026-42246)
Resolves: RHEL-181767
- Fix Net::IMAP command injection vulnerability via unvalidated Symbol arguments (CVE-2026-42258)
Resolves: RHEL-181793
[4.0.3-34]
- Upgrade to Ruby 4.0.3.
Resolves: RHEL-171239
- Fix ERB: Arbitrary code execution via bypass
(CVE-2026-41316)
Resolves: RHEL-170910
- Fix JSON: Denial of Service or Information Disclosure via format string injection
(CVE-2026-33210)
Resolves: RHEL-173457
Fixed packages 5
| Release | Package | Fixed in |
|---|---|---|
| Oracle Linux · 10 | ruby4.0 | 0:4.0.3-35.el10_2 |
| Oracle Linux · 10 | ruby4.0-devel | 0:4.0.3-35.el10_2 |
| Oracle Linux · 10 | ruby4.0-doc | 0:4.0.3-35.el10_2 |
| Oracle Linux · 10 | ruby4.0-rubygem-mysql2 | 0:0.5.7-35.el10_2 |
| Oracle Linux · 10 | ruby4.0-rubygem-pg | 0:1.6.3-35.el10_2 |
Vulnerabilities 2
-
High 8.3
Ruby JSON has a format string injection vulnerability
Ruby JSON is a JSON implementation for Ruby. From version 2.14.0 to before versions 2.15.2.1, 2.17.1.2, and 2.19.2, a format string injection vulnerability can lead to denial of service attacks or information disclosure, when the allow_duplicate_key: false pa…
-
High 8.1
ERB has an @_init deserialization guard bypass via def_module / def_method / def_class
ERB is a templating system for Ruby. Ruby 2.7.0 (before ERB 2.2.0 was published on rubygems.org) introduced an `@_init` instance variable guard in `ERB#result` and `ERB#run` to prevent code execution when an ERB object is reconstructed via `Marshal.load` (des…