CVE-2024-2757

HIGH
Published Apr 29, 2024 Modified Nov 4, 2025 CWE-400

Description

In PHP 8.3.* before 8.3.5, function mb_encode_mimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor Product
php php

References

Frequently Asked Questions

What is CVE-2024-2757? +
In PHP 8.3.* before 8.3.5, function mb_encode_mimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2024-2757? +
CVE-2024-2757 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-2757? +
CVE-2024-2757 affects products from php, specifically: php. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-2757? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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