Highlights
Command Injection: 2 prior fixes. Scrutinize any change in this area.
pymemcache/client/base.py: most-fixed (2 issues). Treat as high-risk during review.
2 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Command Injection: Attackers can inject arbitrary Memcached commands by passing control characters (such as CRLF) inside key names, leading to unauthorized data manipulation or cache poisoning.
Command Injection: Maliciously crafted 'cas' (Check-And-Set) parameter values can be exploited to inject arbitrary commands into the Memcached protocol stream if they are not strictly validated as numeric.