Vulnerability in fetch() API allows access to locally cached data in Firefox

CVE-2018-5131 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:N/A:N

Under certain circumstances the "fetch()" API can return transient local copies of resources that were sent with a "no-store" or "no-cache" cache header instead of downloading a copy from the network as it should. This can result in previously stored, locally cached data of a website being accessible to users if they share a common profile while browsing. This vulnerability affects Firefox ESR < 52.7 and Firefox < 59.

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