CVE-2024-2757

Name: CVE-2024-2757
Creator: NVD / NIST
Published: 2024-04-29T04:15:08.113+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.92%

Last modified Jun 17, 2026

CVE-2024-2757 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.92% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.92%

77.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Php	Php	>= 8.3.0, < 8.3.5

References

http://www.openwall.com/lists/oss-security/2024/04/12/11Mailing List
https://github.com/php/php-src/security/advisories/GHSA-fjp9-9hwx-59fqExploit, Vendor Advisory
https://security.netapp.com/advisory/ntap-20240510-0011/Third Party Advisory
http://www.openwall.com/lists/oss-security/2024/04/12/11Mailing List
https://github.com/php/php-src/security/advisories/GHSA-fjp9-9hwx-59fqExploit, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KJZK3X6B7FBE32FETDSMRLJXTFTHKWSY/
https://security.netapp.com/advisory/ntap-20240510-0011/Third Party Advisory

Timeline

Published: Apr 29, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-2757?

How severe is CVE-2024-2757?

CVE-2024-2757 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.92% probability of exploitation in the next 30 days.

How do I fix CVE-2024-2757?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-2757?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST