Then even in the worst case scenario, they were addressing this issue two days after it was publicly disclosed. So this wasn't a "rush to fix the zero day ASAP" scenario, which makes it harder to justify ignoring errors that started occuring in a small scale rollout.
Considering there were patched libraries at the time of disclosure, those libraries' authors must have been informed ahead of time.
https://react.dev/blog/2025/12/03/critical-security-vulnerab...
Privately Disclosed: Nov 29 Fix pushed: Dec 1 Publicly disclosed: Dec 3
Then even in the worst case scenario, they were addressing this issue two days after it was publicly disclosed. So this wasn't a "rush to fix the zero day ASAP" scenario, which makes it harder to justify ignoring errors that started occuring in a small scale rollout.