Bug 2530880

Summary:	CVE-2026-58649 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": ["83f2cdad-e86e-478b-8dee-0d8d90d34844"]}
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:
Bug Depends On:
Bug Blocks:	2528870

Description Charles Timko 2026-09-09 12:57:16 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.

dotnet watch BrowserRefreshServer does not adequately validate cross-origin WebSocket origins, potentially allowing IL and PDB information disclosure.

CNA: microsoft
CNA impact: Information Disclosure
CWE: CWE-346
Platforms: all
Architectures: all
CVSS 3.1: 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)

Affected packages:
- dotnet-sdk (release 10.0): 10.0.400 - 10.0.400; fixed 10.0.401 [dotnet@ae39133]
- dotnet-sdk (release 9.0): 9.0.300 - 9.0.317; fixed 9.0.318 [sdk@d78666e]
- dotnet-sdk (release 10.0): 10.0.100 - 10.0.111; fixed 10.0.112 [dotnet@882ef16]
- dotnet-sdk (release 8.0): 8.0.100 - 8.0.130; fixed 8.0.131 [sdk@de67b09]
- dotnet-sdk (release 8.0): 8.0.400 - 8.0.424; fixed 8.0.425 [sdk@71ec990]
- dotnet-sdk (release 9.0): 9.0.100 - 9.0.120; fixed 9.0.121 [sdk@97124d7]

Fix commits:
- dotnet/dotnet (release/10.0.4xx): https://github.com/dotnet/dotnet/commit/ae39133877be792de27db50aaf415b5e9f003e11
- dotnet/sdk (release/9.0.3xx): https://github.com/dotnet/sdk/commit/d78666eeb83defc38c76bdf36f57a9a37b8e6e2a
- dotnet/dotnet (release/10.0.1xx): https://github.com/dotnet/dotnet/commit/882ef164b92836bf0cabcf8eb8719274e9dc075e
- dotnet/sdk (release/8.0.1xx): https://github.com/dotnet/sdk/commit/de67b096e71fd0df5ebe2cfd517270651f9f8ef6
- dotnet/sdk (release/8.0.4xx): https://github.com/dotnet/sdk/commit/71ec9905155a8271ee90d42c20aaa54b9425f4ae
- dotnet/sdk (release/9.0.1xx): https://github.com/dotnet/sdk/commit/97124d73362451fe8c40ab5dbaab3396908029cb