CVE-2026-73389: CWE-502 Deserialization of Untrusted Data in The4 Kalles Addons
CVE-2026-73389 is a critical vulnerability in The4 Kalles Addons versions up to and including 1.0.6. It involves unauthenticated PHP Object Injection due to deserialization of untrusted data (CWE-502). This flaw allows remote attackers to execute arbitrary code without any authentication. The vulnerability has a high CVSS score of 9.8, indicating severe impact on confidentiality, integrity, and availability.
AI Analysis
Technical Summary
The4 Kalles Addons versions <= 1.0.6 contain a deserialization vulnerability (CWE-502) that permits unauthenticated PHP Object Injection. This vulnerability enables remote attackers to inject malicious serialized objects, leading to remote code execution. The CVSS 3.1 base score is 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and full impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to execute arbitrary code on the affected system, potentially leading to full system compromise, data theft, or service disruption.
Mitigation Recommendations
No official patch or remediation information is currently available. Users should monitor the vendor's advisory channels for updates and apply patches promptly once released. Until then, restricting access to the vulnerable component and employing web application firewalls to detect and block suspicious serialized payloads may reduce risk. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-73389: CWE-502 Deserialization of Untrusted Data in The4 Kalles Addons
Description
CVE-2026-73389 is a critical vulnerability in The4 Kalles Addons versions up to and including 1.0.6. It involves unauthenticated PHP Object Injection due to deserialization of untrusted data (CWE-502). This flaw allows remote attackers to execute arbitrary code without any authentication. The vulnerability has a high CVSS score of 9.8, indicating severe impact on confidentiality, integrity, and availability.
CVSS v3.1
Score 9.8critical
Affected software
The4
Kalles Addons
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The4 Kalles Addons versions <= 1.0.6 contain a deserialization vulnerability (CWE-502) that permits unauthenticated PHP Object Injection. This vulnerability enables remote attackers to inject malicious serialized objects, leading to remote code execution. The CVSS 3.1 base score is 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and full impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to execute arbitrary code on the affected system, potentially leading to full system compromise, data theft, or service disruption.
Mitigation Recommendations
No official patch or remediation information is currently available. Users should monitor the vendor's advisory channels for updates and apply patches promptly once released. Until then, restricting access to the vulnerable component and employing web application firewalls to detect and block suspicious serialized payloads may reduce risk. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Patchstack
- Date Reserved
- 2026-08-12T14:10:08.047Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a85aa9dacd9273b4918fe85
Added to database: 08/19/2026, 13:07:41 UTC
Last enriched: 09/11/2026, 09:17:56 UTC
Last updated: 10/02/2026, 14:46:10 UTC
Views: 62
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