Linux · Security advisory · May 9, 2026
RHSA-2026:33540: ruby4.0 security update
RHSA-2026:33540, released May 9, 2026, fixes 3 CVEs in ruby4.0 (version 4.0.3-35.el10_2). None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
3
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0078
56th percentile
Priority of the 3 CVEs
Patch now 0
Urgent 0
High 3
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| ruby4.0 | RHEL 10 | 4.0.3-35.el10_2 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| High | CVE-2026-42258 | net-imap: Command Injection via unvalidated Symbol inputs | 7.4 | 0.0078 | None reported | |
| High | CVE-2026-42245 | ruby4.0: Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby | 7.4 | 0.0041 | None reported | |
| High | CVE-2026-42246 | net-imap vulnerable to STARTTLS stripping via invalid response timing | 7.4 | 0.0031 | None reported |
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