{"id":"CVE-2026-73423","revision":null,"records":[{"revision":"3f512d5d0d8544129ca5a03f205cba1f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73423","aliases":[],"title":"Astro: composable `astro/hono` pipeline bypasses `security.checkOrigin` when `middleware()` is absent or misordered","description":"Astro is a web framework for content-driven websites. From 7.0.0 until 7.0.6, the composable astro/hono pipeline installs security.checkOrigin only through the middleware() primitive, while actions() and pages() can dispatch to user code independently. Mounting actions() before middleware(), as in the examples/advanced-routing example and Cloudflare Hono documentation, allows cross-origin form-encoded action requests to execute before the origin check, and using pages() without middleware() drops the check for on-demand endpoints and pages. The flaw enables blind write-only cross-site request forgery using the victim's cookies against ActionHandler.handle and PagesHandler.handleWithErrorFallback when manifest.checkOrigin is enabled; the attacker can trigger a state-mutating action or endpoint handler but cannot read the cross-origin response. The default non-composable astro() pipeline is not affected. This issue is fixed in version 7.0.6.","state":0,"publishedAt":"2026-08-12T20:35:32.181+00:00","modifiedAt":"2026-08-13T17:53:25.469+00:00","affected":[{"ecosystem":"Vendor product","name":"astro","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"withastro\",\n                    \"product\": \"astro\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 7.0.0, < 7.0.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","score":5.1,"severity":"MEDIUM"}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-8mv7-9c27-98vc","https://github.com/withastro/astro/pull/17250","https://github.com/withastro/astro/commit/0b30b35f864310bee8485c952d1877e82e2b9b1a","https://github.com/withastro/astro/releases/tag/astro@7.0.6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73423","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73423","identifiers":["CVE-2026-73423"]},"retained":false,"historicalAffected":[]},{"revision":"0e49364039824b7d95b146696af720fd","observedAt":"2026-10-25T15:19:09.409+00:00","statement":{"source":"nvd","id":"CVE-2026-73423","aliases":[],"title":"Astro is a web framework for content-driven websites. From 7.0.0 until 7.0.6, the composable astro/hono pipeline installs security.checkOrigin only through the middleware() primitive, while actions() and pages() can dispatch to user code in…","description":"Astro is a web framework for content-driven websites. From 7.0.0 until 7.0.6, the composable astro/hono pipeline installs security.checkOrigin only through the middleware() primitive, while actions() and pages() can dispatch to user code independently. Mounting actions() before middleware(), as in the examples/advanced-routing example and Cloudflare Hono documentation, allows cross-origin form-encoded action requests to execute before the origin check, and using pages() without middleware() drops the check for on-demand endpoints and pages. The flaw enables blind write-only cross-site request forgery using the victim's cookies against ActionHandler.handle and PagesHandler.handleWithErrorFallback when manifest.checkOrigin is enabled; the attacker can trigger a state-mutating action or endpoint handler but cannot read the cross-origin response. The default non-composable astro() pipeline is not affected. This issue is fixed in version 7.0.6.","state":0,"publishedAt":"2026-08-12T21:17:41.34+00:00","modifiedAt":"2026-10-24T15:10:00.19+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":5.1,"severity":"MEDIUM"}],"references":["https://github.com/withastro/astro/commit/0b30b35f864310bee8485c952d1877e82e2b9b1a","https://github.com/withastro/astro/pull/17250","https://github.com/withastro/astro/releases/tag/astro@7.0.6","https://github.com/withastro/astro/security/advisories/GHSA-8mv7-9c27-98vc"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73423","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-352"],"productCriteria":[],"sourceDates":{"published":"2026-08-12T21:17:41.340","lastModified":"2026-10-24T15:10:00.190"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-73423","identifiers":["CVE-2026-73423"]},"retained":false,"historicalAffected":[]},{"revision":"81c0e8797f04435fb33239ff5f61b02c","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-8mv7-9c27-98vc","aliases":["CVE-2026-73423"],"title":"Astro: composable `astro/hono` pipeline bypasses `security.checkOrigin` when `middleware()` is absent or misordered","description":"## Summary\n\nIn the composable `astro/hono` pipeline, the `security.checkOrigin` protection is only installed by the `middleware()` primitive. The `actions()` and `pages()` primitives each dispatch to user code independently, so a pipeline that mounts either primitive before (or without) `middleware()` will bypass the origin check for those requests.\n\n## Details\n\n`security.checkOrigin` (default: `true`) is intended to reject cross-site `POST`/`PUT`/`PATCH`/`DELETE` form submissions. In the classic pipeline (`astro()` all-in-one), the check always runs because Astro injects a virtual middleware module even when the user has no `src/middleware.ts`. In the composable `astro/hono` pipeline, the user assembles primitives manually. The check is only installed inside `middleware()` — so:\n\n- Mounting `actions()` before `middleware()` allows cross-origin form-encoded action requests to execute before the gate runs. The `examples/advanced-routing` example and the Cloudflare `hono` docs shipped this order.\n- Omitting `middleware()` entirely (reasonable for apps with no custom middleware) silently drops `checkOrigin` protection for all on-demand endpoints and pages dispatched through `pages()`.\n\nThe attack is a blind write-only CSRF: the attacker can trigger a state-mutating action or endpoint handler using the victim's cookies, but cannot read the cross-origin response body.\n\n## Affected versions\n\nAstro `>= 7.0.0` when using the composable `astro/hono` pipeline with either:\n- `actions()` mounted before `middleware()`, or\n- `pages()` used without `middleware()`\n\nThe default (non-composable) pipeline is not affected.\n\n## Fix\n\nThe origin check is now applied at each dispatch sink (`ActionHandler.handle` and `PagesHandler.handleWithErrorFallback`), gated on `manifest.checkOrigin`, using the same predicate as the middleware. The check is order-independent and a no-op when `middleware()` has already run.\n\nFix: https://github.com/withastro/astro/pull/17250\n\n## Workaround\n\nEnsure `middleware()` is mounted before both `actions()` and `pages()` in the composable pipeline, and that it is always included even when no custom middleware logic is needed:\n\n```ts\napp.use(middleware());\napp.use(actions());\napp.use(pages());\n```","state":0,"publishedAt":"2026-07-20T23:26:27+00:00","modifiedAt":"2026-08-12T20:56:01.953813+00:00","affected":[{"ecosystem":"npm","name":"astro","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"7.0.0"},{"kind":"fixed","version":"7.0.6"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-8mv7-9c27-98vc","https://github.com/withastro/astro/pull/17250","https://github.com/withastro/astro/commit/0b30b35f864310bee8485c952d1877e82e2b9b1a","https://github.com/withastro/astro","https://github.com/withastro/astro/releases/tag/astro@7.0.6"],"sourceUrl":"https://github.com/advisories/GHSA-8mv7-9c27-98vc","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-8mv7-9c27-98vc","identifiers":["GHSA-8mv7-9c27-98vc","CVE-2026-73423"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-25T23:02:08.9235896+00:00","complete":true,"records":1756,"lastAttemptAt":"2026-10-25T23:02:08.9235896+00:00","lastSuccessAt":"2026-10-25T23:02:09.0869487+00:00","error":null,"lastVerifiedAt":"2026-10-25T23:02:09.0869513+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-1a687ad2a0b90150aa7d97c9f39e63de695ae2db23e31ebc28df1492c461b23c-5e0a45ae0cf63c80268dd44eaeb20879d480eba4da3306bde3dcd925fa4c114f","complete":true,"records":414047,"lastAttemptAt":"2026-10-25T23:02:08.5196863+00:00","lastSuccessAt":"2026-10-25T23:02:08.4495153+00:00","error":null,"lastVerifiedAt":"2026-10-25T23:02:08.5196863+00:00","snapshotPublishedAt":"2026-10-25T22:26:55+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-43321610382942b8ad8c85917eab1546","complete":false,"records":4735,"lastAttemptAt":"2026-10-25T23:02:11.7890287+00:00","lastSuccessAt":"2026-10-24T23:18:49.862+00:00","error":"InvalidDataException","lastVerifiedAt":"2026-10-24T23:18:49.862+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":4764,"expectedIdentifiers":13474},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-25T23:02:08.9235896+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-25T23:02:08.9235896+00:00","lastSuccessAt":"2026-10-25T23:02:09.087647+00:00","error":null,"lastVerifiedAt":"2026-10-25T23:02:09.08765+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-204a3fb93a00487e8f7f36db01dc851d","complete":true,"records":13413,"lastAttemptAt":"2026-10-25T23:02:09.6218557+00:00","lastSuccessAt":"2026-10-25T16:19:28.681+00:00","error":null,"lastVerifiedAt":"2026-10-25T16:19:28.681+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13474,"expectedIdentifiers":13474},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-2375a4e597279abf92e8747e140fe8da9d421877cd49cae3ac69a2cb78469b2c","complete":true,"records":9779,"lastAttemptAt":"2026-10-25T23:02:08.8808579+00:00","lastSuccessAt":"2026-10-24T13:19:53.1346702+00:00","error":null,"lastVerifiedAt":"2026-10-25T23:02:08.8808579+00:00","snapshotPublishedAt":"2026-10-24T03:03:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-16ad89dfea13ab9e9b0108e63a759d63bd4559cc68b58491107d62ee35bbbaf2","complete":true,"records":1965,"lastAttemptAt":"2026-10-25T23:02:08.6737644+00:00","lastSuccessAt":"2026-10-23T16:01:26.4487605+00:00","error":null,"lastVerifiedAt":"2026-10-25T23:02:08.6737644+00:00","snapshotPublishedAt":"2026-10-21T12:18:07+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-7da67a15aa6e56a0e3081a7646dc74d537e6ef974afc593c2b1794ed01970648","complete":true,"records":2969,"lastAttemptAt":"2026-10-25T23:02:08.8933341+00:00","lastSuccessAt":"2026-10-24T13:19:59.1145547+00:00","error":null,"lastVerifiedAt":"2026-10-25T23:02:08.8933341+00:00","snapshotPublishedAt":"2026-10-24T08:47:51+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-11236ada05a0588e51df37636716526867f73fb127392c49680b6f8561496a99","complete":true,"records":230781,"lastAttemptAt":"2026-10-25T23:02:08.7805888+00:00","lastSuccessAt":"2026-10-25T22:04:07.173333+00:00","error":null,"lastVerifiedAt":"2026-10-25T23:02:08.7805888+00:00","snapshotPublishedAt":"2026-10-25T21:33:06+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null}]}