[$] A pair of Python vulnerabilities

Two separate vulnerabilities led to the fast-tracked releaseof Python 3.9.2 and 3.8.8 on February 19, though source-onlyreleases of 3.7.10 and 3.6.13 came a few days earlier. Thevulnerabilities may be problematic for some Python users andworkloads; one could potentially lead to remote code execution. The otheris, arguably, not exactly a flaw in the Python standard library-it simplyalso follows an older standard-but it can lead to web cachepoisoning attacks.