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Cache poisoning
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<p>Cache poisoning refers to a <a href="/facts/Vulnerability_(computing)/jg0Gr71M">computer security vulnerability</a> where invalid entries can be placed into a <a href="/facts/Cache_(computing)/gmJYN8wm">cache</a>, which are then assumed to be valid when later used. Two common varieties are <a href="/facts/DNS_cache_poisoning/k85Akwm4">DNS cache poisoning</a> and <a href="/facts/ARP_cache_poisoning/NcWv5skQ">ARP cache poisoning</a>. Web cache poisoning involves the poisoning of <a href="/facts/Web_cache/DqIBcWem">web caches</a> (which has led to security issues in programming languages, including all Python versions at the time in 2021, and expedited security updates). Attacks on other, more specific, caches also exist. </p>