This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-55584 →

DEBIAN-CVE-2026-55584

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 trus...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 phpsysinfo

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 phpsysinfo

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 phpsysinfo

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

References

advisory security-tracker.debian.org