Debian Security Advisory

DLA-2392-1 jruby -- LTS security update

Date Reported:
01 Oct 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-25613.
More information:

A potential HTTP request smuggling vulnerability in WEBrick was reported.

WEBrick (bundled along with jruby) was too tolerant against an invalid Transfer-Encoding header. This may lead to inconsistent interpretation between WEBrick and some HTTP proxy servers, which may allow the attacker to “smuggle” a request.

For Debian 9 stretch, this problem has been fixed in version 1.7.26-1+deb9u3.

We recommend that you upgrade your jruby packages.

For the detailed security status of jruby please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: