Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 5.8 Medium · fixed in Red Hat package updates : update Red Hat when convenient.
Data as of 29 Oct 2026, 19:04 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.6.4, 0.5.14, 0.4.24
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 9 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade net-imap to 0.6.4, 0.5.14 or 0.4.24.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| rubynet-imap | Affected
| Fixed in
|
| rubynet-imap | Affected
| Fixed in
|
| rubynet-imap | Affected
| Fixed in
|
AI-suggested
Red Hat has released updated ruby4.0 RPM packages (version 4.0.5-35.hum1) that fix this vulnerability. Users of affected Red Hat Hardened Images should apply these updates as soon as possible. The vendor advisory provides detailed instructions for applying the update. No additional mitigations are specified. Patch status is confirmed as fixed in the updated RPMs.
Description
This update includes the following RPMs: ruby4.0: * ruby4.0-4.0.5-35.hum1 (aarch64, x86_64) * ruby4.0-bundled-gems-4.0.5-35.hum1 (aarch64, x86_64) * ruby4.0-default-gems-4.0.5-35.hum1 (noarch) * ruby4.0-devel-4.0.5-35.hum1 (aarch64, x86_64) * ruby4.0-doc-4.0.5-35.hum1 (noarch) * ruby4.0-libs-4.0.5-35.hum1 (aarch64, x86_64) * rubygem4.0-bigdecimal-4.0.1-35.hum1 (aarch64, x86_64) * rubygem4.0-bundler-4.0.10-35.hum1 (noarch) * rubygem4.0-devel-4.0.10-35.hum1 (noarch) * rubygem4.0-io-console-0.8.2-35.hum1 (aarch64, x86_64) * rubygem4.0-irb-1.16.0-35.hum1 (noarch) * rubygem4.0-json-2.18.0-35.hum1 (aarch64, x86_64) * rubygem4.0-minitest-6.0.0-35.hum1 (noarch) * rubygem4.0-power_assert-3.0.1-35.hum1 (noarch) * rubygem4.0-psych-5.3.1-35.hum1 (aarch64, x86_64) * rubygem4.0-racc-1.8.1-35.hum1 (aarch64, x86_64) * rubygem4.0-rake-13.3.1-35.hum1 (noarch) * rubygem4.0-rbs-3.10.0-35.hum1 (aarch64, x86_64) * rubygem4.0-rdoc-7.0.4-35.hum1 (noarch) * rubygem4.0-rexml-3.4.4-35.hum1 (noarch) * rubygem4.0-rss-0.3.2-35.hum1 (noarch) * rubygem4.0-rubygems-4.0.10-35.hum1 (noarch) * rubygem4.0-test-unit-3.7.5-35.hum1 (noarch) * rubygem4.0-typeprof-0.31.1-35.hum1 (noarch) * ruby4.0-4.0.5-35.hum1.src (src)
References
- access.redhat.com/errata/RHSA-2026:36978 (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-42257 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-42258 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_36978.json (opens in a new tab)