Debian Security Advisory

DLA-2929-1 ujson -- LTS security update

Date Reported:
01 Mar 2022
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-45958.
More information:

One issue have been discovered in ujson: ultra fast JSON encoder and decoder for Python.

  • CVE-2021-45958

    Stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode) has been detected. Exploitation can, for example, use a large amount of indentation.

    For Debian 9 stretch, this problem has been fixed in version 1.35-1+deb9u1.

    We recommend that you upgrade your ujson packages.

    For the detailed security status of ujson 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: