SB20260921126 - Red Hat Enterprise Linux 9 update for .NET 8.0

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Main Vulnerability Database SB20260921126

SB20260921126 - Red Hat Enterprise Linux 9 update for .NET 8.0

Published: September 21, 2026

Security Bulletin ID SB20260921126
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Origin validation error (CVE-ID: CVE-2026-58649)

CWE-ID: CWE-346 - Origin Validation Error

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an origin validation error in .NET when validating origins. A remote attacker can exploit the vulnerability to disclose sensitive information.

User interaction is required. Successful exploitation could expose developer-time hot reload data, including application metadata, intermediate language updates, debugging information, method names, string literals, and file paths.


Remediation

Install update from vendor's website.

References