CVE-2024-2757
CVSS v3
7.5
HIGH
EPSS Score
1.9 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2024-04-29
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.
Is CVE-2024-2757 actively exploited?
Active exploitation of CVE-2024-2757 has not been confirmed. Its EPSS score was 1.9% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2024-2757?
CVE-2024-2757 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2024-2757 affecting your environment?
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