Red Hat Security Advisory: .NET 8.0 security update
Affects Red Hat .NET 8.0Source GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 6.2 Medium · fixed in Red Hat package updates : update Red Hat .NET 8.0 when convenient.
Data as of 6 Nov 2026, 01:49 UTC
- 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 5 Nov 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 has released updated .NET SDK 8.0.128 and Runtime 8.0.28 packages that fix these vulnerabilities. Users running affected versions on Red Hat Enterprise Linux 10.0 Extended Update Support should apply these updates promptly. Detailed update instructions are available in the Red Hat advisory article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
Description
.NET 8.0 on Red Hat Enterprise Linux contains two security vulnerabilities: a local file tampering issue via link following (CVE-2026-45491) and an ASP.NET Core denial of service via uncontrolled resource consumption (CVE-2026-45591). Updated .NET SDK 8.0.128 and Runtime 8.0.28 packages address these issues. The vulnerabilities have been rated with an important security impact by Red Hat. Users of Red Hat Enterprise Linux 10.0 Extended Update Support are advised to apply the updates to mitigate these vulnerabilities.
References
- access.redhat.com/errata/RHSA-2026:28007 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2487164 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2487224 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_28007.json (opens in a new tab)