{
    "api_version": "1",
    "kind": "dse_post",
    "self": "https://update.dsesecurity.com/api/v1/posts/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/",
    "item": {
        "id": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/",
        "slug": "choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response",
        "url": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/",
        "alternate_urls": {
            "markdown": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response.md",
            "json": "https://update.dsesecurity.com/api/v1/posts/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/"
        },
        "title": "Choose no-store when Cloudflare must not retain a sensitive response",
        "summary": "No-cache and no-store are different instructions, especially when Origin Cache Control is enabled.",
        "format": {
            "slug": "guide",
            "name": "Guide"
        },
        "priority": {
            "slug": "info",
            "name": "Information"
        },
        "featured": false,
        "image": {
            "theme": "network-infrastructure",
            "label": "Networks & infrastructure",
            "alt": "Resilient network core with engineered blue and gold data paths.",
            "card_url": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-card.webp?v=1.8.20",
            "hero_url": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-hero.webp?v=1.8.20",
            "social_url": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-social-v2.jpg?v=1.8.20",
            "width": 2400,
            "height": 1350
        },
        "topics": [
            {
                "slug": "cybersecurity",
                "name": "Cybersecurity",
                "url": "https://update.dsesecurity.com/topic/cybersecurity/"
            },
            {
                "slug": "networks-infrastructure",
                "name": "Networks & Infrastructure",
                "url": "https://update.dsesecurity.com/topic/networks-infrastructure/"
            }
        ],
        "author": {
            "name": "DSE Security Editorial Team",
            "url": "https://update.dsesecurity.com/#editorial-team",
            "type": "Organization"
        },
        "publisher": {
            "name": "Detection Systems & Engineering",
            "url": "https://dsesecurity.com/"
        },
        "published_at": "2026-10-20T18:16:32+00:00",
        "modified_at": "2026-10-20T18:34:35+00:00",
        "reviewed_on": "2026-10-20",
        "reading_minutes": 2,
        "word_count": 257,
        "potentially_affected": "This concerns Cloudflare response caching directives.",
        "dse_recommendation": "DSE recommends classifying authenticated, personalized, and public responses before adjusting cache policy.",
        "primary_source": {
            "name": "Cloudflare — Origin Cache Control",
            "url": "https://developers.cloudflare.com/cache/concepts/cache-control/",
            "published_on": null,
            "authority": "developers.cloudflare.com"
        },
        "publishing_principles": "https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/",
        "usage_info": "https://update.dsesecurity.com/usage/",
        "copyright_notice": "Copyright © 2026 Detection Systems & Engineering. All rights reserved.",
        "content_html": "<p>No-cache and no-store are different instructions, especially when Origin Cache Control is enabled.</p>\n<h2>Source facts</h2>\n<p>Cloudflare documents no-store as prohibiting storage of the request or response. No-cache instead requires validation before reuse and can allow cached storage when Origin Cache Control is enabled. Cache Rules can augment or override origin behavior, so the origin header is only part of the effective configuration. Private responses are intended for a single user rather than a shared cache.</p>\n<p>Source: <a href=\"https://developers.cloudflare.com/cache/concepts/cache-control/\">Cloudflare — Origin Cache Control</a>.</p>\n<h2>Applicability</h2>\n<p>This concerns Cloudflare response caching directives.</p>\n<h2>DSE recommendation</h2>\n<p>DSE recommends classifying authenticated, personalized, and public responses before adjusting cache policy. Use the storage restriction that matches the data-handling requirement and review matching Cache Rules for overrides. Keep browser caching and shared-edge caching decisions explicit. Avoid using no-cache as a synonym for never stored, and do not broaden a cache rule to fix performance without checking cookies and user-specific content. For each sensitive response class, ask the application owner to approve the intended storage behavior in plain language. Include a signed-out request after a signed-in request in the isolated test sequence, and make any cross-session content reuse an immediate stop condition for the proposed policy.</p>\n<h2>Verification</h2>\n<p>With authorized test accounts, inspect origin and proxied response headers and the effective cache behavior across repeated requests. Compare anonymous and signed-in responses using separate sessions. Confirm sensitive content is not reused between users, and retain the rule configuration with the observations instead of treating a single MISS as proof of permanent non-storage.</p>\n<h2>Official reference</h2>\n<p><a href=\"https://developers.cloudflare.com/cache/concepts/cache-control/\">Cloudflare — Origin Cache Control</a>. Reviewed October 20, 2026.</p>",
        "content_text": "No-cache and no-store are different instructions, especially when Origin Cache Control is enabled.\nSource facts\nCloudflare documents no-store as prohibiting storage of the request or response. No-cache instead requires validation before reuse and can allow cached storage when Origin Cache Control is enabled. Cache Rules can augment or override origin behavior, so the origin header is only part of the effective configuration. Private responses are intended for a single user rather than a shared cache.\nSource: Cloudflare — Origin Cache Control.\nApplicability\nThis concerns Cloudflare response caching directives.\nDSE recommendation\nDSE recommends classifying authenticated, personalized, and public responses before adjusting cache policy. Use the storage restriction that matches the data-handling requirement and review matching Cache Rules for overrides. Keep browser caching and shared-edge caching decisions explicit. Avoid using no-cache as a synonym for never stored, and do not broaden a cache rule to fix performance without checking cookies and user-specific content. For each sensitive response class, ask the application owner to approve the intended storage behavior in plain language. Include a signed-out request after a signed-in request in the isolated test sequence, and make any cross-session content reuse an immediate stop condition for the proposed policy.\nVerification\nWith authorized test accounts, inspect origin and proxied response headers and the effective cache behavior across repeated requests. Compare anonymous and signed-in responses using separate sessions. Confirm sensitive content is not reused between users, and retain the rule configuration with the observations instead of treating a single MISS as proof of permanent non-storage.\nOfficial reference\nCloudflare — Origin Cache Control. Reviewed October 20, 2026.",
        "content_markdown": "No-cache and no-store are different instructions, especially when Origin Cache Control is enabled.\n\n## Source facts\n\nCloudflare documents no-store as prohibiting storage of the request or response. No-cache instead requires validation before reuse and can allow cached storage when Origin Cache Control is enabled. Cache Rules can augment or override origin behavior, so the origin header is only part of the effective configuration. Private responses are intended for a single user rather than a shared cache.\n\nSource: [Cloudflare — Origin Cache Control](https://developers.cloudflare.com/cache/concepts/cache-control/).\n\n## Applicability\n\nThis concerns Cloudflare response caching directives.\n\n## DSE recommendation\n\nDSE recommends classifying authenticated, personalized, and public responses before adjusting cache policy. Use the storage restriction that matches the data-handling requirement and review matching Cache Rules for overrides. Keep browser caching and shared-edge caching decisions explicit. Avoid using no-cache as a synonym for never stored, and do not broaden a cache rule to fix performance without checking cookies and user-specific content. For each sensitive response class, ask the application owner to approve the intended storage behavior in plain language. Include a signed-out request after a signed-in request in the isolated test sequence, and make any cross-session content reuse an immediate stop condition for the proposed policy.\n\n## Verification\n\nWith authorized test accounts, inspect origin and proxied response headers and the effective cache behavior across repeated requests. Compare anonymous and signed-in responses using separate sessions. Confirm sensitive content is not reused between users, and retain the rule configuration with the observations instead of treating a single MISS as proof of permanent non-storage.\n\n## Official reference\n\n[Cloudflare — Origin Cache Control](https://developers.cloudflare.com/cache/concepts/cache-control/). Reviewed October 20, 2026."
    },
    "json_ld": {
        "@context": "https://schema.org",
        "@graph": [
            {
                "@type": "Organization",
                "@id": "https://dsesecurity.com/#organization",
                "name": "Detection Systems & Engineering",
                "alternateName": "DSE Security",
                "url": "https://dsesecurity.com/",
                "logo": {
                    "@type": "ImageObject",
                    "url": "https://update.dsesecurity.com/assets/dse-logo-20260812.png?v=1.8.20"
                }
            },
            {
                "@type": "Organization",
                "@id": "https://update.dsesecurity.com/#editorial-team",
                "name": "DSE Security Editorial Team",
                "url": "https://update.dsesecurity.com/",
                "parentOrganization": {
                    "@id": "https://dsesecurity.com/#organization"
                }
            },
            {
                "@type": "WebSite",
                "@id": "https://update.dsesecurity.com/#website",
                "name": "DSE Updates",
                "alternateName": "DSE Security Knowledge Hub",
                "url": "https://update.dsesecurity.com/",
                "inLanguage": "en-US",
                "publisher": {
                    "@id": "https://dsesecurity.com/#organization"
                },
                "potentialAction": {
                    "@type": "SearchAction",
                    "target": {
                        "@type": "EntryPoint",
                        "urlTemplate": "https://update.dsesecurity.com/?q={search_term_string}"
                    },
                    "query-input": "required name=search_term_string"
                }
            },
            {
                "@type": "WebPage",
                "@id": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/",
                "url": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/",
                "isPartOf": {
                    "@id": "https://update.dsesecurity.com/#website"
                },
                "lastReviewed": "2026-10-20"
            },
            {
                "@type": "BreadcrumbList",
                "@id": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/#breadcrumbs",
                "itemListElement": [
                    {
                        "@type": "ListItem",
                        "position": 1,
                        "name": "DSE Updates",
                        "item": "https://update.dsesecurity.com/"
                    },
                    {
                        "@type": "ListItem",
                        "position": 2,
                        "name": "Cybersecurity",
                        "item": "https://update.dsesecurity.com/topic/cybersecurity/"
                    },
                    {
                        "@type": "ListItem",
                        "position": 3,
                        "name": "Choose no-store when Cloudflare must not retain a sensitive response",
                        "item": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/"
                    }
                ]
            },
            {
                "@type": [
                    "Article",
                    "TechArticle"
                ],
                "@id": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/#article",
                "identifier": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/",
                "url": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/",
                "headline": "Choose no-store when Cloudflare must not retain a sensitive response",
                "description": "No-cache and no-store are different instructions, especially when Origin Cache Control is enabled.",
                "abstract": "No-cache and no-store are different instructions, especially when Origin Cache Control is enabled.",
                "articleBody": "No-cache and no-store are different instructions, especially when Origin Cache Control is enabled.\nSource facts\nCloudflare documents no-store as prohibiting storage of the request or response. No-cache instead requires validation before reuse and can allow cached storage when Origin Cache Control is enabled. Cache Rules can augment or override origin behavior, so the origin header is only part of the effective configuration. Private responses are intended for a single user rather than a shared cache.\nSource: Cloudflare — Origin Cache Control.\nApplicability\nThis concerns Cloudflare response caching directives.\nDSE recommendation\nDSE recommends classifying authenticated, personalized, and public responses before adjusting cache policy. Use the storage restriction that matches the data-handling requirement and review matching Cache Rules for overrides. Keep browser caching and shared-edge caching decisions explicit. Avoid using no-cache as a synonym for never stored, and do not broaden a cache rule to fix performance without checking cookies and user-specific content. For each sensitive response class, ask the application owner to approve the intended storage behavior in plain language. Include a signed-out request after a signed-in request in the isolated test sequence, and make any cross-session content reuse an immediate stop condition for the proposed policy.\nVerification\nWith authorized test accounts, inspect origin and proxied response headers and the effective cache behavior across repeated requests. Compare anonymous and signed-in responses using separate sessions. Confirm sensitive content is not reused between users, and retain the rule configuration with the observations instead of treating a single MISS as proof of permanent non-storage.\nOfficial reference\nCloudflare — Origin Cache Control. Reviewed October 20, 2026.",
                "datePublished": "2026-10-20T18:16:32+00:00",
                "dateModified": "2026-10-20T18:34:35+00:00",
                "mainEntityOfPage": {
                    "@id": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/"
                },
                "inLanguage": "en-US",
                "isAccessibleForFree": true,
                "author": {
                    "@type": "Organization",
                    "name": "DSE Security Editorial Team",
                    "url": "https://update.dsesecurity.com/#editorial-team"
                },
                "publisher": {
                    "@id": "https://dsesecurity.com/#organization"
                },
                "image": {
                    "@type": "ImageObject",
                    "@id": "https://update.dsesecurity.com/updates/choose-no-store-when-cloudflare-must-not-retain-a-sensitive-response/#primaryimage",
                    "url": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-social-v2.jpg?v=1.8.20",
                    "contentUrl": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-social-v2.jpg?v=1.8.20",
                    "width": 1200,
                    "height": 630,
                    "caption": "Choose no-store when Cloudflare must not retain a sensitive response"
                },
                "articleSection": [
                    "Cybersecurity",
                    "Networks & Infrastructure"
                ],
                "keywords": [
                    "Cybersecurity",
                    "Networks & Infrastructure",
                    "Guide",
                    "Information priority"
                ],
                "genre": "Guide",
                "about": [
                    {
                        "@type": "Thing",
                        "name": "Cybersecurity",
                        "url": "https://update.dsesecurity.com/topic/cybersecurity/"
                    },
                    {
                        "@type": "Thing",
                        "name": "Networks & Infrastructure",
                        "url": "https://update.dsesecurity.com/topic/networks-infrastructure/"
                    }
                ],
                "wordCount": 257,
                "timeRequired": "PT2M",
                "publishingPrinciples": "https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/",
                "usageInfo": "https://update.dsesecurity.com/usage/",
                "copyrightHolder": {
                    "@id": "https://dsesecurity.com/#organization"
                },
                "copyrightNotice": "Copyright © 2026 Detection Systems & Engineering. All rights reserved.",
                "citation": {
                    "@type": "CreativeWork",
                    "name": "Cloudflare — Origin Cache Control",
                    "url": "https://developers.cloudflare.com/cache/concepts/cache-control/"
                }
            }
        ]
    }
}