CVE-2008-5557

CriticalCVSS 10.0/10Last modified Jun 16, 2026

Description

Heap-based buffer overflow in ext/mbstring/libmbfl/filters/mbfilter_htmlent.c in the mbstring extension in PHP 4.3.0 through 5.2.6 allows context-dependent attackers to execute arbitrary code via a crafted string containing an HTML entity, which is not properly handled during Unicode conversion, related to the (1) mb_convert_encoding, (2) mb_check_encoding, (3) mb_convert_variables, and (4) mb_parse_str functions.

Metrics

CVSS 2.0 10.0/10AV:N/AC:L/Au:N/C:C/I:C/A:C

Weakness enumeration

CWE-119

Affected software

No affected versions have been published.

Timeline

Published
Dec 23, 2008
Last modified
Jun 16, 2026
NVD status
Modified

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CVE-2008-5557: Critical severity, CVSS 10.0 | Vulnix