CVE-2026-77138

unknowncovered by 1 sourcefirst seen 2026-08-25

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.

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Exploitation outlook

Low exploitation risk0.42% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2026-77138: The extension fails to safely process untrusted client input of an attacker-controlled cookie …nvd · 2026-08-25

External references

NVD record for CVE-2026-77138

CVE.org record

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