CVE-2007-1660: Pcre

Medium severity, CVSS 6.8. EPSS: 4.1% chance of exploitation in the next 30 days.

Perl-Compatible Regular Expression (PCRE) library before 7.0 does not properly calculate sizes for unspecified "multiple forms of character class", which triggers a buffer overflow that allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code.

Affected products

• Pcre Pcre: up to and including 6.9

Published 2007-11-07. Last modified 2026-06-16.