Debian Security Advisory

DLA-2167-1 python-bleach -- LTS security update

Date Reported:
01 Apr 2020
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 955388.
In Mitre's CVE dictionary: CVE-2020-6817.
More information:

A vulnerability was discovered in python-bleach, a whitelist-based HTML-sanitizing library. Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to a regular expression denial of service (ReDoS).

For Debian 8 Jessie, this problem has been fixed in version 1.4-1+deb8u1.

We recommend that you upgrade your python-bleach packages.

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