Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Affects Red HatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 2.3 Low · fixed in Red Hat package updates : update Red Hat net-imap when convenient.
Data as of 12 Nov 2026, 23:24 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 35% 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:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/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 13 Nov 2026.
What to do
Upgrade net-imap to 0.6.4, 0.5.14 or 0.4.24; net-imap to 0.4.24.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| rubynet-imap | Affected
| Fixed in
|
| rubynet-imap | Affected
| Fixed in
|
| rubynet-imap | Affected
| Fixed in
|
RubyGemsnet-imappkg:gem/net-imapOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has released updated RPM packages for ruby4.0 and related components that fix this vulnerability. Users should apply these updates as provided in the Red Hat advisory RHSA-2026:33551. Additionally, to reduce risk, applications using the Net::IMAP library should be configured to connect only to trusted IMAP servers and avoid untrusted or unverified IMAP services. This operational control helps prevent exploitation by malicious IMAP responses.
Description
This update includes the following RPMs: ruby4.0: * ruby4.0-4.0.0-33.4.hum1 (aarch64, x86_64) * ruby4.0-bundled-gems-4.0.0-33.4.hum1 (aarch64, x86_64) * ruby4.0-default-gems-4.0.0-33.4.hum1 (noarch) * ruby4.0-devel-4.0.0-33.4.hum1 (aarch64, x86_64) * ruby4.0-doc-4.0.0-33.4.hum1 (noarch) * ruby4.0-libs-4.0.0-33.4.hum1 (aarch64, x86_64) * rubygem4.0-bigdecimal-4.0.1-33.4.hum1 (aarch64, x86_64) * rubygem4.0-bundler-4.0.3-33.4.hum1 (noarch) * rubygem4.0-devel-4.0.3-33.4.hum1 (noarch) * rubygem4.0-io-console-0.8.2-33.4.hum1 (aarch64, x86_64) * rubygem4.0-irb-1.16.0-33.4.hum1 (noarch) * rubygem4.0-json-2.18.0-33.4.hum1 (aarch64, x86_64) * rubygem4.0-minitest-6.0.0-33.4.hum1 (noarch) * rubygem4.0-power_assert-3.0.1-33.4.hum1 (noarch) * rubygem4.0-psych-5.3.1-33.4.hum1 (aarch64, x86_64) * rubygem4.0-racc-1.8.1-33.4.hum1 (aarch64, x86_64) * rubygem4.0-rake-13.3.1-33.4.hum1 (noarch) * rubygem4.0-rbs-3.10.0-33.4.hum1 (aarch64, x86_64) * rubygem4.0-rdoc-7.0.3-33.4.hum1 (noarch) * rubygem4.0-rexml-3.4.4-33.4.hum1 (noarch) * rubygem4.0-rss-0.3.2-33.4.hum1 (noarch) * rubygem4.0-rubygems-4.0.3-33.4.hum1 (noarch) * rubygem4.0-test-unit-3.7.5-33.4.hum1 (noarch) * rubygem4.0-typeprof-0.31.1-33.4.hum1 (noarch) * ruby4.0-4.0.0-33.4.hum1.src (src) Security Fix(es): ruby4.0: * CVE-2026-42245 * CVE-2026-42246 * CVE-2026-42256 * CVE-2026-47240 * CVE-2026-47242
References
- access.redhat.com/errata/RHSA-2026:33551 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-42245 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-42246 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-42256 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-47240 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-47242 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-47241 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_33551.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:33576 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2468495 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2468498 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2468499 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_33576.json (opens in a new tab)