Vulnerability Details CVE-2025-1734
In PHP from 8.1.* before 8.1.32, from 8.2.* before 8.2.28, from 8.3.* before 8.3.19, from 8.4.* before 8.4.5, when receiving headers from HTTP server, the headers missing a colon (:) are treated as valid headers even though they are not. This may confuse applications into accepting invalid headers.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 30.9%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2025-1734