Three vulnearbilities in the regular expression handling libraries can be exploited to cause a backend crash, infinite loops or memory exhaustion. This vulnearbility can be exploited through frontend applications that allow unfiltered regular expressions to be passed in queries.

Version Information

Affected Version Fixed In
8.2 8.2.6
8.1 8.1.11
8.0 8.0.15
7.4 7.4.19

For more information about PostgreSQL versioning, please visit the versioning page.

Reporting Security Vulnerabilities

If you wish to report a new security vulnerability in PostgreSQL, please send an email to

For reporting non-security bugs, please see the Report a Bug page.