CVE-2026-48019
CRLF injection in Laravel's default email rule enables SMTP smuggling and spoofed-mail relay
- Published
- Sep 4, 2026
- Updated
- Sep 8, 2026
- Assigning CNA
- GitHub_M
- Evidence observed
- Sep 5, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:LLow · next 30 days
- Percentile
- 50.6%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Laravel is a web application framework. Prior to versions 12.60.0 and 13.10.0, a CRLF injection vulnerability in Laravel's email validation, in combination with how Symfony Mailer and Symfony Mime handle certain character sequences, may allow an unauthenticated attacker to interfere with outbound email processing in applications that send mail to user-supplied addresses. This issue has been patched in versions 12.60.0 and 13.10.0.
Sources
1- laravel-frameworkPatch
Fork of laravel/framework 10.50.2 with CVE-2026-48019 (CRLF injection in default email rule) backported into ValidatesAttributes::validateEmail. Tagged 10.51.0.
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