Red Hat Security Advisory: .NET 10.0 security, bug fix, and enhancement update
Affects Red Hat .NET 10.0Source GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 5.9 Medium · fixed in Red Hat package updates : update Red Hat microsoft.netcore.app when convenient.
Data as of 30 Oct 2026, 06:59 UTC
Thin evidence
One scorer or none| CNA (microsoft) | CVSS 3.1 | 5.9 |
|---|
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 10.0.11, 8.0.30, 9.0.19 +2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 11 Aug 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 to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft.NET 10.0 runtime | Affected
| Fixed in
|
| Microsoft.NET 8.0 runtime | Affected
| Fixed in
|
| Microsoft.NET 9.0 runtime | Affected
| Fixed in
|
| MicrosoftMicrosoft Visual Studio 2022 version 17.14 | Affected
| Fixed in
|
| MicrosoftMicrosoft Visual Studio 2026 version 18.8 | Affected
| Fixed in
|
NuGetmicrosoft.netcore.apppkg:nuget/microsoft.netcore.appOther 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
An official fix is available in the form of updated .NET 10.0 packages: SDK 10.0.111 and runtime 10.0.11 for Red Hat Enterprise Linux 9 and its variants. Users should apply these updates promptly following Red Hat's published guidance at https://access.redhat.com/articles/11258 to remediate the vulnerabilities. No additional mitigation steps are indicated beyond applying the update.
Description
.NET 10.0 for Red Hat Enterprise Linux has received an important security update addressing multiple vulnerabilities including security feature bypass, information disclosure, denial of service, and elevation of privilege. The update upgrades the SDK to version 10.0.111 and the runtime to 10.0.11. These fixes resolve critical security issues identified by CVE-2026-62899, CVE-2026-62900, CVE-2026-62901, and CVE-2026-62909. The advisory covers Red Hat Enterprise Linux 9 and related variants. Users are advised to apply the update to mitigate these vulnerabilities.
References
- access.redhat.com/errata/RHSA-2026:55857 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2512175 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2512179 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2512180 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2512185 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_55857.json (opens in a new tab)