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CVE-2026-45491VulnerabilityPublished Updated

Red Hat Security Advisory: .NET 10.0 security update

Affects Red Hat .NET 10.0Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-45491· Medium 6.2

Not known to be exploited · CVSS 6.2 Medium · fixed in Red Hat package updates : update Red Hat .NET 10.0 when convenient.

Data as of 6 Nov 2026, 01:49 UTC

CVSS 3.1 base score
6.2Medium
How severe the flaw is on the 0–10 CVSS scale.
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:C

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Jun 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 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

ProductAffectedFixed in
Microsoft.NET 10.0Affected
  • >=10.0.0 <10.0.9
Fixed in
  • 10.0.9
Microsoft.NET 8.0Affected
  • >=8.0 <8.0.28
Fixed in
  • 8.0.28
Microsoft.NET 8.0Affected
  • >=8.0.0 <8.0.28
Fixed in
  • 8.0.28
Microsoft.NET 9.0Affected
  • >=9.0.0 <9.0.17
Fixed in
  • 9.0.17

AI-suggested

Red Hat has released official fixes in .NET SDK 10.0.109 and .NET Runtime 10.0.9. Users should apply these updates promptly by following Red Hat's update instructions at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the provided patches.

Description

.NET 10.0 for Red Hat Enterprise Linux has received an important security update addressing two vulnerabilities: a local file tampering issue via link following (CVE-2026-45491) and a denial of service vulnerability in ASP.NET Core due to uncontrolled resource consumption (CVE-2026-45591). Updated versions .NET SDK 10.0.109 and .NET Runtime 10.0.9 are available to mitigate these issues.

References

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