GHSA-5vg9-5847-vvmq: Laravel Framework CRLF Injection Vulnerability

HIGH
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CVSS 8.9
CWE-93
Published
Advisory Summary

GHSA-5vg9-5847-vvmq is a HIGH (CVSS 8.9) crlf injection vulnerability (CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')) affecting Laravel Framework libraries in the Packagist ecosystem. The issue involves crlf injection in default email rule. Remediation is available by upgrading affected packages to version 13.10.0, 12.60.0.

GHSA-5vg9-5847-vvmq at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-5vg9-5847-vvmq
Severity HIGH
CVSS v3.1 Base Score 8.9
CWE Classification CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')
Affected Product Laravel Framework
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability Low (A:L)

How to Fix GHSA-5vg9-5847-vvmq

To remediate this vulnerability, upgrade all affected Laravel Framework dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

laravel/framework fixed: 13.10.0 
Upgrade laravel/framework to 13.10.0
laravel/framework fixed: 12.60.0 
Upgrade laravel/framework to 12.60.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for laravel/framework

How to Check if You Are Affected

To determine whether your application is affected by GHSA-5vg9-5847-vvmq, inspect your project dependencies for Laravel Framework:

inspect dependencies for laravel/framework

Analyze the terminal output to locate any version of Laravel Framework in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 13.10.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection'), where the product uses crlf (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes crlf sequences from inputs. In Laravel Framework, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary 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. ## Description Laravel applications that send email to addresses provided by users — for example during authentication flows or contact forms — may be vulnerable to manipulation of outbound mail content if the address is not adequately sanitized before it reaches the mail transport layer. An attacker who can supply an email address to such a flow may, under certain conditions, be able to influence the content of emails sent by the application, cause those emails to be delivered to unintended recipients, or cause the application's mail server to send unintended messages. ## Impact Affected applications may be exposed to unauthorized access and mail relay abuse. The severity depends on what the application sends by email and how its mail infrastructure is configured. ## Remediation Upgrade to version 12.60.0 or later, or 13.10.0 or later.

GHSA-5vg9-5847-vvmq Affected Laravel Framework Versions

2 component(s)
Fixed Versions:
13.10.012.60.0
Product / Package Ecosystem Affected Versions Fixed Version
laravel/framework
 Packagist
≥ 13.0.0
< 13.10.0
13.10.0
laravel/framework
 Packagist
< 12.60.0
12.60.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/laravel/framework/security/advisories/GHSA-5vg9-5847-vvmq
Laravel Framework Source Repository REPOSITORY
https://github.com/laravel/framework

Frequently Asked Questions

What is GHSA-5vg9-5847-vvmq?
GHSA-5vg9-5847-vvmq is a security vulnerability in Laravel Framework involving CRLF injection in default email rule under CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection').
Which Laravel Framework versions are affected?
Affected versions include releases prior to 13.10.0, 12.60.0 across affected packages: laravel/framework.
What version fixes GHSA-5vg9-5847-vvmq?
Upgrading to 13.10.0, 12.60.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is laravel/framework affected?
Yes, laravel/framework is affected in releases prior to 13.10.0, 12.60.0. Upgrade your dependency to 13.10.0, 12.60.0 or later.
What is the CVSS score of GHSA-5vg9-5847-vvmq?
GHSA-5vg9-5847-vvmq has a CVSS v3.1 base score of 8.9 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L.
What CWE is associated with GHSA-5vg9-5847-vvmq?
GHSA-5vg9-5847-vvmq is classified under CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') (The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.).
How can I check Packagist dependencies for GHSA-5vg9-5847-vvmq?
Run the dependency tree command: 'inspect dependencies for laravel/framework'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5vg9-5847-vvmq",
  "modified" : "2026-06-17T13:53:44Z",
  "published" : "2026-06-17T13:53:44Z",
  "aliases" : [ ],
  "summary" : "Laravel Framework: CRLF injection in default email rule ",
  "details" : "## Summary\nA 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.\n\n## Description\nLaravel applications that send email to addresses provided by users — for example during authentication flows or contact forms — may be vulnerable to manipulation of outbound mail content if the address is not adequately sanitized before it reaches the mail transport layer.\nAn attacker who can supply an email address to such a flow may, under certain conditions, be able to influence the content of emails sent by the application, cause those emails to be delivered to unintended recipients, or cause the application's mail server to send unintended messages.\n\n## Impact\nAffected applications may be exposed to unauthorized access and mail relay abuse. The severity depends on what the application sends by email and how its mail infrastructure is configured.\n\n## Remediation\nUpgrade to version 12.60.0 or later, or 13.10.0 or later.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laravel/framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "13.0.0"
      }, {
        "fixed" : "13.10.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 13.9.0"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laravel/framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "12.60.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/laravel/framework/security/advisories/GHSA-5vg9-5847-vvmq"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/laravel/framework"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-93" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-17T13:53:44Z",
    "nvd_published_at" : null
  }
}