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    <lastBuildDate>Tue, 29 Sep 2026 04:47:55 +0000</lastBuildDate>
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      <title>CVE-2026-55584 — phpSysInfo: IP allowlist (PSI_ALLOWED) bypass via spoofed X-Forwarded-For / Client-IP headers</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-55584</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; phpsysinfo&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; phpsysinfo&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
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