CVE-2009-4418

MediumCVSS 5.0/10Last modified Jun 16, 2026

Description

The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to cause a denial of service (resource consumption) via a deeply nested serialized variable, as demonstrated by a string beginning with a:1: followed by many {a:1: sequences.

Metrics

CVSS 2.0 5.0/10AV:N/AC:L/Au:N/C:N/I:N/A:P

Weakness enumeration

CWE-189

Affected software

No affected versions have been published.

Timeline

Published: Dec 24, 2009
Last modified: Jun 16, 2026
NVD status: Modified

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