Debian Security Advisory

DLA-2467-2 lxml -- LTS security update

Date Reported:
18 Dec 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-27783.
More information:

The fix for CVE-2020-27783, released as DLA 2467-1, was incomplete as the <math/svg> component was still affected by the vulnerability. This update includes an additional patch that completes the fix. Note that a package with version 3.7.1-1+deb9u2 was uploaded, but before the publication of the advisory a regression was discovered, which was immediately corrected prior to publication of this advisory.

For Debian 9 stretch, this problem has been fixed in version 3.7.1-1+deb9u3.

We recommend that you upgrade your lxml packages.

For the detailed security status of lxml 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: