Debian Security Advisory

DLA-2664-1 curl -- LTS security update

Date Reported:
17 May 2021
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 986269.
In Mitre's CVE dictionary: CVE-2021-22876.
More information:

Viktor Szakats reported that libcurl, an URL transfer library, does not strip off user credentials from the URL when automatically populating the Referer HTTP request header field in outgoing HTTP requests. Sensitive authentication data may leak to the server that is the target of the second HTTP request.

For Debian 9 stretch, this problem has been fixed in version 7.52.1-5+deb9u14.

We recommend that you upgrade your curl packages.

For the detailed security status of curl 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: