Debian Linux Security Advisory 1911-1 – It was discovered that pygresql, a PostgreSQL module for Python, was missing a function to call PQescapeStringConn(). This is needed, because PQescapeStringConn() honours the charset of the connection and prevents insufficient escaping, when certain multibyte character encodings are used. The new function is called pg_escape_string(), which takes the database connection as a first argument. The old function escape_string() has been preserved as well for backwards compatibility.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/82026/dsa-1911-1.txt
Source: https://packetstormsecurity.com/files/82026/Debian-Linux-Security-Advisory-1911-1.html