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CVE-2026-62899VulnerabilityPublished Updated

Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update

Affects Red Hat .NET 8.0Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-62899· Medium 5.9

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 13 Nov 2026, 23:54 UTC

CVSS 3.1 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (microsoft)CVSS 3.15.9
EPSS
0.7% chance of exploitation in 30 days – higher than 55% 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:C

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 14 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Microsoft.NET 10.0 runtimeAffected
  • >=10.0.0 <10.0.11
Fixed in
  • 10.0.11
Microsoft.NET 8.0 runtimeAffected
  • >=8.0.0 <8.0.30
Fixed in
  • 8.0.30
Microsoft.NET 9.0 runtimeAffected
  • >=9.0.0 <9.0.19
Fixed in
  • 9.0.19
MicrosoftMicrosoft Visual Studio 2022 version 17.14Affected
  • >=17.14.0 <17.14.38
Fixed in
  • 17.14.38
MicrosoftMicrosoft Visual Studio 2026 version 18.8Affected
  • >=18.0 <18.8.3
Fixed in
  • 18.8.3
NuGetmicrosoft.netcore.apppkg:nuget/microsoft.netcore.appOther threatsAffected
  • =10.0.0
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 an official update that addresses these vulnerabilities by upgrading the .NET SDK to 8.0.130 and runtime to 8.0.30. Users should apply this update promptly to remediate the security issues. Detailed instructions for applying the update are available in the Red Hat advisory (https://access.redhat.com/articles/11258). No additional mitigation steps are indicated or required beyond applying the official patch.

Description

Red Hat has released an important security update for .NET 8.0 on Red Hat Enterprise Linux 10, addressing multiple vulnerabilities including security feature bypass, information disclosure, denial of service, and elevation of privilege. The update upgrades the .NET SDK to version 8.0.130 and runtime to 8.0.30. These vulnerabilities affect the .NET Core runtime and libraries used for cross-platform application development. The advisory covers various architectures including x86_64, s390x, ppc64le, and aarch64. Users are advised to apply the update to mitigate these security issues.

References

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