How severe is CVE-2024-2757?

CVE-2024-2757 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-2757 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-2757?

CVE-2024-2757 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-2757?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-2757 have an EU (EUVD) identifier?

Yes. CVE-2024-2757 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-27701.

When was CVE-2024-2757 published?

CVE-2024-2757 was published on 2024-04-29 and last updated on 2026-06-17.

CVE-2024-2757

CVE-2024-2757 is a high-severity vulnerability in Php with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-27701
Weakness: CWE-400
Affected product: Php
Published: 2024-04-29
Last modified: 2026-06-17

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.

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.
How severe is CVE-2024-2757?: CVE-2024-2757 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-2757 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-2757?: CVE-2024-2757 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-2757?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-2757 have an EU (EUVD) identifier?: Yes. CVE-2024-2757 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-27701.
When was CVE-2024-2757 published?: CVE-2024-2757 was published on 2024-04-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

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