Impact

Some regexes are vulnerable to regular expression denial of service (REDoS) due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings.

Patches

Please update uap-ruby to >= v2.6.0

For more information

GHSA-cmcx-xhr8-3w9p

Reported in uap-core by Ben Caller @bcaller