Yebo Cao discovered that Python incorrectly handled certain URLs. An attacker could possibly use this issue to bypass blocklisting methods by supplying a URL that starts with blank characters.
2.7.17-1~18.04ubuntu1.113.6.9-1~18.04ubuntu1.123.8.10-0ubuntu1~20.04.73.10.6-1~22.04.2ubuntu12.7.6-8ubuntu0.6+esm142.7.12-1ubuntu0~16.04.18+esm43.5.2-2ubuntu0~16.04.13+esm7