SEPTEMBER 17, 2026
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Case File

CVE-2026-77138

CRITICAL · CVSS 9.3 EPSS 0.42% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-25 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The vulnerability allows unauthenticated remote attackers to exploit unsafe handling of untrusted client input in a TYPO3 extension, specifically through PHP's unserialize() function. This can lead to PHP Object Injection, resulting in Remote Code Execution on the server. Organizations using affected TYPO3 extensions should prioritize patching this critical vulnerability to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
remote code execution code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-77138
Severity
CRITICAL
CVSS
9.3
EPSS
0.42%

Original NVD Description

The extension fails to safely process untrusted client input of an attacker-controlled cookie directly to PHP's unserialize(). A remote, unauthenticated attacker can supply a crafted serialized payload to trigger PHP Object Injection, leading to Remote Code Execution on the TYPO3 server.