CVE catalog
CVE-2026-55584
phpsysinfo: CVE-2026-55584
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.91% · Oct 25, 2026
phpSysInfo is a customizable PHP script that displays system information. Prior to 3.4.6, the PSI_ALLOWED access-control check in read_config.php trusts attacker-controlled X-Forwarded-For and Client-IP HTTP headers before REMOTE_ADDR. A remote unauthenticated attacker can supply an allowed address in one of these headers to impersonate a trusted client and access exposed hostname, kernel, CPU, memory, filesystem, and network-interface information. This issue is fixed in version 3.4.6.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | phpsysinfo | sid | 3.4.4-2 | vulnerable |
| Debian | phpsysinfo | forky | 3.4.4-2 | vulnerable |
| Debian | phpsysinfo | trixie | 3.4.4-1 | vulnerable |
| Debian | phpsysinfo | bookworm | 3.4.2-3 | vulnerable |
| Composer | phpsysinfo/phpsysinfo | Not reported | 3.4.6 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | phpsysinfo | source | sid | (unfixed) | not yet assigned | Not reported | [1146713] |
| Debian | phpsysinfo | source | forky | (unfixed) | not yet assigned | Not reported | [1146713] |
| Debian | phpsysinfo | source | trixie | (unfixed) | not yet assigned | Not reported | [1146713] |
| Debian | phpsysinfo | source | bookworm | (unfixed) | not yet assigned | Not reported | [1146713] |
| Composer | phpsysinfo/phpsysinfo | composer | Not reported | 3.4.6 | Not reported | GHSA-786W-P5PM-CVGH | Not reported |
Notes
[trixie] phpsysinfo: Minor issue [bookworm] phpsysinfo: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [phpsysinfo]Affected
Details (2)
3.4.2-3· all · bookwormAffected
dsa · phpsysinfo · debian · bookworm; dsa · phpsysinfo · debian · 12
3.4.2-3· all · bookwormAffected
dsa · phpsysinfo · debian · bookworm; dsa · phpsysinfo · debian · 12
[Debian 13 (Trixie)]
- [phpsysinfo]Affected
Details (2)
3.4.4-1· all · trixieAffected
dsa · phpsysinfo · debian · 13
3.4.4-1· all · trixieAffected
dsa · phpsysinfo · debian · 13
Observed:
References
- [https://github.com/advisories/GHSA-786w-p5pm-cvgh]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-55584]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-55584]
- [https://security-tracker.debian.org/tracker/CVE-2026-55584]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]