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High 7.5 CVSS 3.1 PHP Published on 2024-04-29

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.

CVECVE-2024-2757 GHSANo GHSA advisory
View at the source View JSON Last modified at the source: 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.

Original text by NVD (NIST), public domain.

CVSS metrics 3.1

Source: security@php.net · secondary
High 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vectorNetwork
ComplexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh

References

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