A use-after-free exists in Python through 3.9 via heappushpop in heapq.
{
"severity": "High",
"cpes": [
"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"cpe:2.3:a:python:python:3.9.0:alpha1:*:*:*:*:*:*",
"cpe:2.3:a:python:python:3.9.0:alpha2:*:*:*:*:*:*"
]
}