| Name | CVE-2025-1734 | 
| Description | 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. | 
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) | 
| References | DLA-4088-1, DSA-5878-1 | 
The table below lists information on source packages.
| Source Package | Release | Version | Status | 
|---|---|---|---|
| php7.4 (PTS) | bullseye | 7.4.33-1+deb11u5 | vulnerable | 
| bullseye (security) | 7.4.33-1+deb11u9 | fixed | |
| php8.2 (PTS) | bookworm, bookworm (security) | 8.2.29-1~deb12u1 | fixed | 
| php8.4 (PTS) | forky, sid, trixie | 8.4.11-1 | fixed | 
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs | 
|---|---|---|---|---|---|---|
| php7.4 | source | bullseye | 7.4.33-1+deb11u8 | DLA-4088-1 | ||
| php7.4 | source | (unstable) | (unfixed) | |||
| php8.2 | source | bookworm | 8.2.28-1~deb12u1 | DSA-5878-1 | ||
| php8.2 | source | (unstable) | (unfixed) | |||
| php8.4 | source | (unstable) | 8.4.5-1 | 
https://github.com/php/php-src/security/advisories/GHSA-pcmh-g36c-qc44
Fixed by: https://github.com/php/php-src/commit/0548c4c1756724a89ef8310709419b08aadb2b3b (php-8.1.32)