Bug 2553801

Summary:	CVE-2026-66822 dotnet9.0: .NET Information Disclosure Vulnerability [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Charles Timko <ctimko>
Component:	dotnet9.0	Assignee:	Omair Majid <omajid>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	omajid
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["ef5053e5-c310-4d24-ba82-8f0dd27ddff0"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Charles Timko 2026-10-15 20:27:49 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.

Affected products:
- .NET Runtime Libraries (release 10.0): 10.0.0 - 10.0.12; fixed 10.0.13 
- .NET Runtime Libraries (release 8.0): 8.0.0 - 8.0.31; fixed 8.0.32 
- .NET Runtime Libraries (release 9.0): 9.0.0 - 9.0.20; fixed 9.0.21 
- .NET Runtime Libraries (release 11.0): 11.0.0-preview.1 - 11.0.0-rc.1; fixed 11.0.0-rc.2