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CVE-2025-26646VulnerabilityPublished Updated

Red Hat Security Advisory: .NET 8.0 security update

Affects Red Hat .NET 8.0Source GCVE Database

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Not known to be exploited.

Data as of 5 Nov 2026, 18:47 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 May 2025

  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

AI-suggested

Red Hat has released fixed versions: .NET SDK 8.0.116 and .NET Runtime 8.0.16. Users should apply these updates promptly to remediate the vulnerability. Detailed update instructions are available from Red Hat's official advisory and article (https://access.redhat.com/articles/11258). No additional mitigation steps are specified or required beyond applying the official patches.

Description

.NET 8.0 contains a security vulnerability identified as CVE-2025-26646, related to a spoofing issue affecting .NET and Visual Studio. Red Hat has released updated versions of the .NET SDK (8.0.116) and .NET Runtime (8.0.16) to address this vulnerability. The update is rated as having an Important security impact by Red Hat Product Security. The vulnerability involves a spoofing flaw, categorized under CWE-290 (Authentication Bypass by Spoofing).

References

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