VULNERABILITY INTELLIGENCE

CVE-2010-1866

CVSS score9.8 CRITICAL
EPSS probability6.72%
CISA KEVNot currently listed
Published2010-05-07
Last modified2026-06-16
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.

Weakness classification

  • CWE-190: Integer Overflow or Wraparound

Primary references