UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Affected versions were found to improperly decode certain characters. JSON strings that contain escaped surrogate characters not part of a proper surrogate pair were decoded incorrectly. Besides corrupting strings, this allowed for potential key confusion and value overwriting in dictionaries. All users parsing JSON from untrusted sources are vulnerable. From version 5.4.0, UltraJSON decodes lone surrogates in the same way as the standard library's `json` module does, preserving them in the parsed output. Users are advised to upgrade. There are no known workarounds for this issue. #### Notes Author| Note ---|--- [ccdm94](<https://launchpad.net/~ccdm94>) | according to https://github.com/ultrajson/ultrajson/releases/tag/5.4.0, the commits that fix this issue are e0e5db9a46 and bc7bdff051. However, release 5.4.0 does include a few other commits which seem to be related to the above.

Affected Package

OS OS Version Package Name Package Version
ubuntu 22.04 collada2gltf any
ubuntu upstream collada2gltf any
ubuntu upstream collada2gltf any
ubuntu 16.04 collada2gltf any
ubuntu 20.04 pandas any
ubuntu 22.04 pandas any
ubuntu upstream pandas any
ubuntu 14.04 pandas any
ubuntu upstream pandas any
ubuntu 16.04 pandas any
ubuntu 20.04 ujson any
ubuntu 22.04 ujson any
ubuntu upstream ujson 5.4.0
ubuntu 16.04 ujson any