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

Quick assessment

Affected
laravel framework
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Laravel framework是Laravel公司的一款PHP开发框架。 Laravel framework 12.60.0之前版本和13.10.0之前版本存在输入验证错误漏洞，该漏洞源于Laravel的电子邮件验证存在CRLF注入问题，并结合Symfony Mailer和Symfony Mime对特定字符序列的处理方式，可能导致未经身份验证的攻击者干扰应用程序向用户提供的地址发送外发电子邮件的处理。

CVSS 8.9 · High EPSS 0.51% · P43

Possible ATT&CK Techniques 1 AI

T1565 · Data Manipulation

Affected Version Matrix 2

VendorProduct Version RangeStatus
laravel framework >= 13.0.0, < 13.10.0 affected
< 12.60.0 affected
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I. Basic Information for CVE-2026-48019

Vulnerability Information
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Vulnerability Title
CRLF injection in Laravel's default email rule enables SMTP smuggling and spoofed-mail relay
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Laravel framework 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Laravel framework是Laravel公司的一款PHP开发框架。 Laravel framework 12.60.0之前版本和13.10.0之前版本存在输入验证错误漏洞，该漏洞源于Laravel的电子邮件验证存在CRLF注入问题，并结合Symfony Mailer和Symfony Mime对特定字符序列的处理方式，可能导致未经身份验证的攻击者干扰应用程序向用户提供的地址发送外发电子邮件的处理。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
laravel framework >= 13.0.0, < 13.10.0 -

II. Public POCs for CVE-2026-48019

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III. Intelligence Information for CVE-2026-48019

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Patches & Fixes for CVE-2026-48019 (3)

Vendor Advisories for CVE-2026-48019 (1)

Vendor Pages for CVE-2026-48019 (2)

IV. Related Vulnerabilities

Same product: framework
Same vendor: laravel
Same weakness: CWE-93

V. Comments for CVE-2026-48019

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