get_headers() silently truncates after a null byte
At a glance
Severity
MEDIUM 5.3
EPSS
EPSS 2.77 % · percentile 86 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
php
NVD status
Modified
Description
In PHP versions 7.2.x below 7.2.29, 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using get_headers() with user-supplied URL, if the URL contains zero (\0) character, the URL will be silently truncated at it. This may cause some software to make incorrect assumptions about the target of the get_headers() and possibly send some information to a wrong server.
