{"version":"2.1.281","anchor":"local-server-responses-add-vary-user-agent","canonical_anchor":"local-server-responses-add-vary-user-agent","heading":"Local server responses add Vary: User-Agent","tier":null,"area":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281\/e\/local-server-responses-add-vary-user-agent","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281","markdown":"### Local server responses add Vary: User-Agent\n\nLocal server responses that carry the version header now also send Vary: User-Agent\n\n**Unclear.** The finding does not say which local server this is.\n\n**What**\n\nWhen a local server response includes the version header, it now also sends `Vary: User-Agent`. This header tells anything that caches the response that it can differ depending on which program asked for it.\n\n**Why**\n\nIt stops a cached response meant for one client from being handed to a different one."}