{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-128121", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-11-12T22:42:47.031Z", "datePublished": "2026-11-13T19:44:19.075Z", "dateUpdated": "2026-11-13T21:22:54.622Z"}, "containers": {"cna": {"title": "SvelteKit: Prerendered paths are interpreted as regular expressions in Vercel route config generated by @sveltejs/adapter-vercel and @sveltejs/adapter-static", "problemTypes": [{"descriptions": [{"cweId": "CWE-116", "lang": "en", "description": "CWE-116: Improper Encoding or Escaping of Output", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-625", "lang": "en", "description": "CWE-625: Permissive Regular Expression", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/sveltejs/kit/security/advisories/GHSA-jf9x-2fg2-hx4w", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-jf9x-2fg2-hx4w"}, {"name": "https://github.com/sveltejs/kit/pull/17620", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/kit/pull/17620"}, {"name": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd"}, {"name": "https://github.com/sveltejs/kit/commit/2ed61a6aa3ac230b89e3528654c587847d1525a0", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/kit/commit/2ed61a6aa3ac230b89e3528654c587847d1525a0"}, {"name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@3.0.11", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@3.0.11"}, {"name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@4.0.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@4.0.1"}, {"name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@6.3.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@6.3.5"}, {"name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@7.0.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@7.0.2"}], "affected": [{"vendor": "sveltejs", "product": "kit", "versions": [{"version": "< 2.70.4", "status": "affected"}, {"version": ">= 3.0.0-next.0, < 3.1.1", "status": "affected"}]}, {"vendor": "@sveltejs", "product": "adapter-vercel", "versions": [{"version": "< 6.3.5", "status": "affected"}, {"version": ">= 7.0.0-next.0, < 7.0.2", "status": "affected"}]}, {"vendor": "@sveltejs", "product": "adapter-static", "versions": [{"version": "< 3.0.11", "status": "affected"}, {"version": ">= 4.0.0-next.0, < 4.0.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-13T19:44:19.075Z"}, "descriptions": [{"lang": "en", "value": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to @sveltejs/adapter-vercel 6.3.5 and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1, an attacker-influenced link crawled during prerendering could be emitted into the generated Vercel routing configuration without escaping regular-expression metacharacters. The configuration could consequently interpret the path as regular-expression syntax, match unintended application paths, and expose content or behavior outside the intended path. This issue is fixed in @sveltejs/adapter-vercel 6.3.5 and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1."}], "source": {"advisory": "GHSA-jf9x-2fg2-hx4w", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-13T21:22:41.259065Z", "id": "CVE-2026-128121", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-13T21:22:54.622Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "kit", "vendor": "sveltejs", "versions": [{"status": "affected", "version": "< 2.70.4"}, {"status": "affected", "version": ">= 3.0.0-next.0, < 3.1.1"}]}, {"product": "adapter-vercel", "vendor": "@sveltejs", "versions": [{"status": "affected", "version": "< 6.3.5"}, {"status": "affected", "version": ">= 7.0.0-next.0, < 7.0.2"}]}, {"product": "adapter-static", "vendor": "@sveltejs", "versions": [{"status": "affected", "version": "< 3.0.11"}, {"status": "affected", "version": ">= 4.0.0-next.0, < 4.0.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to @sveltejs/adapter-vercel 6.3.5 and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1, an attacker-influenced link crawled during prerendering could be emitted into the generated Vercel routing configuration without escaping regular-expression metacharacters. The configuration could consequently interpret the path as regular-expression syntax, match unintended application paths, and expose content or behavior outside the intended path. This issue is fixed in @sveltejs/adapter-vercel 6.3.5 and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1."}], "id": "CVE-2026-128121", "lastModified": "2026-11-13T22:17:23.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-128121", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-13T21:22:41.259065Z", "version": "2.0.3"}}]}, "published": "2026-11-13T20:18:56.970", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd"}, {"source": "security-advisories@github.com", "url": "https://github.com/sveltejs/kit/commit/2ed61a6aa3ac230b89e3528654c587847d1525a0"}, {"source": "security-advisories@github.com", "url": "https://github.com/sveltejs/kit/pull/17620"}, {"source": "security-advisories@github.com", "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@3.0.11"}, {"source": "security-advisories@github.com", "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@4.0.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@6.3.5"}, {"source": "security-advisories@github.com", "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@7.0.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-jf9x-2fg2-hx4w"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-116"}, {"lang": "en", "value": "CWE-625"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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