{"id":"CVE-2026-114060","aliases":["EUVD-2026-107011","GHSA-pfhg-q3qv-9q6r","GHSA-pvhg-7v4p-f5q9"],"status":"published","title":"SvelteKit before 3.0.0 Open Redirect via Enhanced Form Actions","description":"SvelteKit (@sveltejs/kit) before 3.0.0 contains an open redirect vulnerability in enhanced form actions (use:enhance) on routes accepting paths beginning with a double slash. Attackers can craft action paths starting with // that become protocol-relative URLs, causing non-redirect form results to navigate victims to attacker-controlled sites.","severity":{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00202,"percentile":0.10186,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-601"],"published":"2026-10-21T00:36:34Z","modified":"2026-10-28T02:30:46Z","fixes":[{"ecosystem":"npm","package":"@sveltejs/kit","fixed_in":["3.0.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@sveltejs/kit","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.0"}]}]},{"source":"osv","ecosystem":"npm","package":"@sveltejs/kit","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.0.0"}]}]}],"products":[{"vendor":"sveltejs","product":"kit"}],"references":[{"url":"https://github.com/sveltejs/kit/security/advisories/GHSA-pfhg-q3qv-9q6r","tags":["vendor-advisory","advisory","web"]},{"url":"https://www.vulncheck.com/advisories/sveltekit-before-3.0.0-open-redirect-via-enhanced-form-actions","tags":["third-party-advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114060","tags":["advisory"]},{"url":"https://github.com/sveltejs/kit/commit/91aae3547c6cd2935d79c09a53e27c740100000a","tags":["web"]},{"url":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@3.0.0","tags":["web"]},{"url":"https://github.com/advisories/GHSA-pfhg-q3qv-9q6r"},{"url":"https://github.com/advisories/GHSA-pvhg-7v4p-f5q9"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114060.json","tags":["advisory"]},{"url":"https://github.com/sveltejs/kit","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-114060","title":"SvelteKit before 3.0.0 Open Redirect via Enhanced Form Actions","description":"SvelteKit (@sveltejs/kit) before 3.0.0 contains an open redirect vulnerability in enhanced form actions (use:enhance) on routes accepting paths beginning with a double slash. Attackers can craft action paths starting with // that become protocol-relative URLs, causing non-redirect form results to navigate victims to attacker-controlled sites.","status":"published","published":"2026-10-21T00:36:34.741Z","modified":"2026-10-21T15:50:38.726Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low","assessor":"cna"},{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T13:40:01.309549Z"}],"euvd":[{"id":"EUVD-2026-107011","description":"SvelteKit (@sveltejs/kit) before 3.0.0 contains an open redirect vulnerability in enhanced form actions (use:enhance) on routes accepting paths beginning with a double slash. Attackers can craft action paths starting with // that become protocol-relative URLs, causing non-redirect form results to navigate victims to attacker-controlled sites.","status":"published","published":"2026-10-21T00:36:34Z","modified":"2026-10-21T15:50:38Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"}],"updated_at":"2026-11-02T16:59:36.721365Z"}],"ghsa":[{"id":"GHSA-pfhg-q3qv-9q6r","title":"SvelteKit: URL redirection to untrusted site via enhanced form submission","description":"### Impact\nApplications using enhanced form actions (`use:enhance`) on routes that accept paths beginning with `//`, such as catch-all routes, may be vulnerable to an open redirect.\n\n### Patches\nA fix has been prepared for `@sveltejs/kit` 3.0.0. Users should upgrade to 3.0.0 or later.\n\nThe fix preserves leading double slashes in action paths without generating protocol-relative URLs, restricts non-redirect action navigation to the current origin, and includes the origin when comparing action locations with the current page.\n\n### Workarounds\nReject requests whose parsed URL pathname begins with `//` before route resolution, for example in a reverse proxy or a SvelteKit `handle` hook.\n\nAlternatively, disable navigation for non-redirect enhanced form results by supplying a custom submission callback:\n\n```svelte\n\u003cform method=\"POST\" use:enhance={() =\u003e ({ update }) =\u003e update({ navigate: false })}\u003e\n  \u003c!-- form fields --\u003e\n\u003c/form\u003e\n```\n\nThis applies non-redirect results to the current page instead of navigating to the action location.","status":"published","published":"2026-10-23T20:58:24Z","modified":"2026-10-23T20:58:25Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"},{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:41:35.723785Z"},{"id":"GHSA-pvhg-7v4p-f5q9","title":"Duplicate Advisory: SvelteKit before 3.0.0 Open Redirect via Enhanced Form Actions","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-pfhg-q3qv-9q6r. This link is maintained to preserve external references.\n\n## Original Description\nSvelteKit (@sveltejs/kit) before 3.0.0 contains an open redirect vulnerability in enhanced form actions (use:enhance) on routes accepting paths beginning with a double slash. Attackers can craft action paths starting with // that become protocol-relative URLs, causing non-redirect form results to navigate victims to attacker-controlled sites.","status":"withdrawn","published":"2026-10-21T03:32:18Z","modified":"2026-10-23T20:57:39Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/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","level":"low"},{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:41:35.723785Z"}],"nvd":[{"id":"CVE-2026-114060","description":"SvelteKit (@sveltejs/kit) before 3.0.0 contains an open redirect vulnerability in enhanced form actions (use:enhance) on routes accepting paths beginning with a double slash. Attackers can craft action paths starting with // that become protocol-relative URLs, causing non-redirect form results to navigate victims to attacker-controlled sites.","status":"published","published":"2026-10-21T01:17:29.147Z","modified":"2026-10-22T17:39:56.76Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/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","level":"low","assessor":"secondary"},{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:13:02.045979Z"}],"osv":[{"id":"CVE-2026-114060","title":"SvelteKit before 3.0.0 Open Redirect via Enhanced Form Actions","description":"SvelteKit (@sveltejs/kit) before 3.0.0 contains an open redirect vulnerability in enhanced form actions (use:enhance) on routes accepting paths beginning with a double slash. Attackers can craft action paths starting with // that become protocol-relative URLs, causing non-redirect form results to navigate victims to attacker-controlled sites.","status":"published","published":"2026-10-21T00:36:34.741Z","modified":"2026-10-28T02:30:46.225927843Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:44:56.310988Z"},{"id":"GHSA-pfhg-q3qv-9q6r","title":"SvelteKit: URL redirection to untrusted site via enhanced form submission","description":"### Impact\nApplications using enhanced form actions (`use:enhance`) on routes that accept paths beginning with `//`, such as catch-all routes, may be vulnerable to an open redirect.\n\n### Patches\nA fix has been prepared for `@sveltejs/kit` 3.0.0. Users should upgrade to 3.0.0 or later.\n\nThe fix preserves leading double slashes in action paths without generating protocol-relative URLs, restricts non-redirect action navigation to the current origin, and includes the origin when comparing action locations with the current page.\n\n### Workarounds\nReject requests whose parsed URL pathname begins with `//` before route resolution, for example in a reverse proxy or a SvelteKit `handle` hook.\n\nAlternatively, disable navigation for non-redirect enhanced form results by supplying a custom submission callback:\n\n```svelte\n\u003cform method=\"POST\" use:enhance={() =\u003e ({ update }) =\u003e update({ navigate: false })}\u003e\n  \u003c!-- form fields --\u003e\n\u003c/form\u003e\n```\n\nThis applies non-redirect results to the current page instead of navigating to the action location.","status":"published","published":"2026-10-23T20:58:24Z","modified":"2026-10-23T21:15:03.74177606Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:46:52.891208Z"},{"id":"GHSA-pvhg-7v4p-f5q9","title":"Duplicate Advisory: SvelteKit before 3.0.0 Open Redirect via Enhanced Form Actions","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-pfhg-q3qv-9q6r. This link is maintained to preserve external references.\n\n## Original Description\nSvelteKit (@sveltejs/kit) before 3.0.0 contains an open redirect vulnerability in enhanced form actions (use:enhance) on routes accepting paths beginning with a double slash. Attackers can craft action paths starting with // that become protocol-relative URLs, causing non-redirect form results to navigate victims to attacker-controlled sites.","status":"withdrawn","published":"2026-10-21T03:32:18Z","modified":"2026-10-23T21:15:03.740832757Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/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","level":"low"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:46:53.700556Z"}]}}