Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Affects Red HatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 6.2 Medium · fixed in Red Hat package updates : update Red Hat when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 32% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 10.0.9, 8.0.28, 9.0.17
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 9 Jun 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 30 Oct 2026.
What to do
Upgrade .NET to 10.0.9 (10.0) or 8.0.28 (8.0) or 9.0.17 (9.0).
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft.NET 10.0 | Affected
| Fixed in
|
| Microsoft.NET 8.0 | Affected
| Fixed in
|
| Microsoft.NET 8.0 | Affected
| Fixed in
|
| Microsoft.NET 9.0 | Affected
| Fixed in
|
AI-suggested
Red Hat advises applying the relevant security updates included in the RPM packages listed in the advisory to remediate the vulnerabilities. No practical temporary workaround is available that meets Red Hat's standards for usability and stability. Users should follow Red Hat's update instructions at https://images.redhat.com/ to apply the fixes.
Description
A security update for Red Hat Hardened Images RPMs addresses multiple vulnerabilities including a denial of service flaw in ASP.NET Core SignalR and Blazor Server. The issue involves processing deeply nested MessagePack arrays that can cause excessive recursion and a stack overflow, leading to application termination. This vulnerability allows unauthenticated remote attackers to cause denial of service. Red Hat has released updated RPM packages to fix these issues.
References
- access.redhat.com/errata/RHSA-2026:26994 (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-45591 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-45491 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-45736 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-59870 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-59868 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-59724 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_26994.json (opens in a new tab)