And an equal amount of stupidity in the whole ecosystem, apparently there are no "unit-tests" for trivial failure modes, like 8 bits of entropy, before adding a CA to the trusted list.
What next, googling the public key finds a 2 year old pastebin with the private key?
Even just a human glancing at the private key should do it.
Don't they even test script changes on a staging server? How could there be such a script error in production that was not caught in testing/staging?
This sounds very like a fundamental organization error, not an innocent whoopsie. It should lead to a permanent ban of the organization.