CVE-2015-2327: Pcre Perl Compatible Regular Expression Library

High severity, CVSS 7.5. EPSS: 4% chance of exploitation in the next 30 days.

PCRE before 8.36 mishandles the /(((a\2)|(a*)\g<-1>))*/ pattern and related patterns with certain internal recursive back references, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

Affected products

• Pcre Perl Compatible Regular Expression Library: up to and including 8.35

Published 2015-12-02. Last modified 2026-06-17.