Unrated

DEBIAN-CVE-2026-55584

Type: advisorySource: OSV1 source record

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.

Announced 28 Aug 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-55584

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-55584

phpsysinfo

Source reference: /affected/0/package/name

Affected versions: 3.4.2-3
Source reference: /affected/0/versions
3.4.3-1
Source reference: /affected/0/versions
3.4.3-2
Source reference: /affected/0/versions
3.4.3-3
Source reference: /affected/0/versions
3.4.4-1
Source reference: /affected/0/versions
3.4.4-2
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

phpsysinfo

Source reference: /affected/1/package/name

Affected versions: 3.4.4-1
Source reference: /affected/1/versions
3.4.4-2
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

phpsysinfo

Source reference: /affected/2/package/name

Affected versions: 3.4.4-1
Source reference: /affected/2/versions
3.4.4-2
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "phpsysinfo",
      "purl": "pkg:deb/debian/phpsysinfo?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.4.2-3",
      "3.4.3-1",
      "3.4.3-2",
      "3.4.3-3",
      "3.4.4-1",
      "3.4.4-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55584.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "phpsysinfo",
      "purl": "pkg:deb/debian/phpsysinfo?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.4.4-1",
      "3.4.4-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55584.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "phpsysinfo",
      "purl": "pkg:deb/debian/phpsysinfo?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.4.4-1",
      "3.4.4-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55584.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #57397 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 17:13:55 GMT
Publisher date: Fri, 28 Aug 2026 20:18:29 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-55584 · Revision 1Source updated