Bug 2457781 (CVE-2026-32178)

Summary: CVE-2026-32178 dotnet: Dotnet: SMTP Command Injection and Header Injection via MailAddress parsing flaw
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the .NET runtime (System.Net.Mail) in how email address data is parsed. Improper neutralization of special characters, specifically carriage return and line feed (CR/LF) sequences, may allow specially crafted email address input to be interpreted incorrectly. An attacker could exploit this issue to perform email spoofing by injecting additional headers or altering how the email address is processed during SMTP operations
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: 2458418, 2458419, 2458420, 2458421    
Bug Blocks:    

Description OSIDB Bzimport 2026-04-13 08:10:36 UTC
Dotnet: SMTP Command Injection and Header Injection via MailAddress Parsing Flaw in System.Net.Mail

Affected .NET versions: 6.0, 8.0, 9.0, 10.0

Comment 2 errata-xmlrpc 2026-04-16 13:50:18 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:8470 https://access.redhat.com/errata/RHSA-2026:8470

Comment 3 errata-xmlrpc 2026-04-16 13:50:56 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:8472 https://access.redhat.com/errata/RHSA-2026:8472

Comment 4 errata-xmlrpc 2026-04-16 14:02:21 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:8468 https://access.redhat.com/errata/RHSA-2026:8468

Comment 5 errata-xmlrpc 2026-04-16 14:02:44 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:8467 https://access.redhat.com/errata/RHSA-2026:8467

Comment 6 errata-xmlrpc 2026-04-16 14:10:32 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:8469 https://access.redhat.com/errata/RHSA-2026:8469

Comment 7 errata-xmlrpc 2026-04-16 14:35:00 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:8475 https://access.redhat.com/errata/RHSA-2026:8475

Comment 8 errata-xmlrpc 2026-04-16 14:36:33 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:8473 https://access.redhat.com/errata/RHSA-2026:8473

Comment 9 errata-xmlrpc 2026-04-16 14:42:02 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:8471 https://access.redhat.com/errata/RHSA-2026:8471

Comment 10 errata-xmlrpc 2026-04-16 14:43:29 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:8474 https://access.redhat.com/errata/RHSA-2026:8474

Comment 17 errata-xmlrpc 2026-05-04 01:32:16 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:13281 https://access.redhat.com/errata/RHSA-2026:13281

Comment 18 errata-xmlrpc 2026-05-04 01:34:44 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:13280 https://access.redhat.com/errata/RHSA-2026:13280

Comment 19 errata-xmlrpc 2026-05-04 01:38:17 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:13283 https://access.redhat.com/errata/RHSA-2026:13283

Comment 20 errata-xmlrpc 2026-05-04 01:52:24 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:13282 https://access.redhat.com/errata/RHSA-2026:13282

Comment 21 errata-xmlrpc 2026-05-05 11:16:15 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:13693 https://access.redhat.com/errata/RHSA-2026:13693