CVE-2007-1659: Pcre

Medium severity, CVSS 6.8. EPSS: 3.5% chance of exploitation in the next 30 days.

Perl-Compatible Regular Expression (PCRE) library before 7.3 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via regex patterns containing unmatched "\Q\E" sequences with orphan "\E" codes.

Affected products

• Pcre Pcre: up to and including 7.3

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