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Vulnerability · Published Sep 4, 2026 · Assigned by GitHub_M

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

High 8.9

In plain English

A high-severity security flaw in framework from laravel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.9High
Exploit odds (30 days)0.5%top 56.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12php-laravel-frameworkno fix listedDEBIAN-CVE-2026-48019
Debian:13php-laravel-frameworkno fix listedDEBIAN-CVE-2026-48019
Debian:14php-laravel-framework13.31.0+dfsg-1DEBIAN-CVE-2026-48019
Packagistlaravel/framework13.10.0GHSA-5vg9-5847-vvmq
Packagistlaravel/framework12.60.0GHSA-5vg9-5847-vvmq

Affected products (as reported)

VendorProductVersions
laravel framework >= 13.0.0, < 13.10.0< 12.60.0

Weakness: CWE-93 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L

References