{"id":"GHSA-q3j6-qgpj-74h6","revision":null,"records":[{"revision":"a3e6c90c7be14fa6ba63e0ecb8adae2b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-6321","aliases":[],"title":"fast-uri vulnerable to path traversal via percent-encoded dot segments","description":"fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URIs could collapse onto the same normalized path. Applications that normalize or compare attacker-controlled URLs to enforce path-based policy can be bypassed, with a path that appears confined under an allowed prefix normalizing to a different location. Versions <= 3.1.0 are affected. Update to 3.1.1 or later.","state":0,"publishedAt":"2026-05-04T19:31:57.253+00:00","modifiedAt":"2026-09-10T12:04:59.137+00:00","affected":[{"ecosystem":"Vendor product","name":"fast-uri","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"fast-uri\",\n                    \"product\": \"fast-uri\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.1.1\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"3.1.1\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:npm/fast-uri\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/fastify/fast-uri/security/advisories/GHSA-q3j6-qgpj-74h6","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-6321","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-6321","identifiers":["CVE-2026-6321"]},"retained":false,"historicalAffected":[]},{"revision":"279599e724f146719927341af7c67788","observedAt":"2026-11-13T16:05:29.616+00:00","statement":{"source":"euvd","id":"EUVD-2026-27129","aliases":["CVE-2026-6321"],"title":"fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URI…","description":"fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URIs could collapse onto the same normalized path. Applications that normalize or compare attacker-controlled URLs to enforce path-based policy can be bypassed, with a path that appears confined under an allowed prefix normalizing to a different location. Versions <= 3.1.0 are affected. Update to 3.1.1 or later.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":null}],"references":["https://github.com/fastify/fast-uri/security/advisories/GHSA-q3j6-qgpj-74h6","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-27129","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 4, 2026, 7:31:57 PM","dateUpdated":"Sep 10, 2026, 12:04:59 PM"},"relatedAdvisories":[{"id":"RHSA-2026:26234","title":"Red Hat Security Advisory: Red Hat Developer Hub 1.9.5 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Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-27129","identifiers":["EUVD-2026-27129","CVE-2026-6321"]},"retained":false,"historicalAffected":[]},{"revision":"4417e6fc5f59462dbf3c3cc791300561","observedAt":"2026-11-12T22:18:32.671+00:00","statement":{"source":"nvd","id":"CVE-2026-6321","aliases":[],"title":"fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URI…","description":"fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URIs could collapse onto the same normalized path. Applications that normalize or compare attacker-controlled URLs to enforce path-based policy can be bypassed, with a path that appears confined under an allowed prefix normalizing to a different location. Versions <= 3.1.0 are affected. Update to 3.1.1 or later.","state":0,"publishedAt":"2026-05-04T20:16:20.95+00:00","modifiedAt":"2026-11-11T23:10:00.263+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · ce714d77-add3-4f53-aff5-83d477b104bb · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":"HIGH"},{"system":"CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":"HIGH"}],"references":["https://cna.openjsf.org/security-advisories.html","https://github.com/fastify/fast-uri/security/advisories/GHSA-q3j6-qgpj-74h6","https://access.redhat.com/errata/RHSA-2026:19238","https://access.redhat.com/errata/RHSA-2026:20338","https://access.redhat.com/errata/RHSA-2026:21338","https://access.redhat.com/errata/RHSA-2026:24473","https://access.redhat.com/errata/RHSA-2026:24766","https://access.redhat.com/errata/RHSA-2026:24866","https://access.redhat.com/errata/RHSA-2026:24977","https://access.redhat.com/errata/RHSA-2026:25089","https://access.redhat.com/errata/RHSA-2026:25123","https://access.redhat.com/errata/RHSA-2026:26214","https://access.redhat.com/errata/RHSA-2026:26234","https://access.redhat.com/errata/RHSA-2026:26416","https://access.redhat.com/errata/RHSA-2026:26420","https://access.redhat.com/errata/RHSA-2026:34342","https://access.redhat.com/errata/RHSA-2026:37385","https://access.redhat.com/errata/RHSA-2026:42078","https://access.redhat.com/errata/RHSA-2026:42079","https://access.redhat.com/errata/RHSA-2026:56366","https://access.redhat.com/errata/RHSA-2026:56431","https://access.redhat.com/errata/RHSA-2026:56928","https://access.redhat.com/errata/RHSA-2026:57013","https://access.redhat.com/security/cve/CVE-2026-6321","https://bugzilla.redhat.com/show_bug.cgi?id=2466582","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6321.json"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6321","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Modified","weaknesses":["CWE-22"],"productCriteria":["cpe:2.3:a:openjsf:fast-uri:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-05-04T20:16:20.950","lastModified":"2026-11-11T23:10:00.263"},"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-2026-6321","identifiers":["CVE-2026-6321"]},"retained":false,"historicalAffected":[]},{"revision":"bbf4238e96284c0495cedab3bdc74820","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-q3j6-qgpj-74h6","aliases":["CVE-2026-6321"],"title":"fast-uri vulnerable to path traversal via percent-encoded dot segments","description":"### Impact\n\n`fast-uri` v3.1.0 and earlier decodes percent-encoded path separators (`%2F`) and dot segments (`%2E`) before applying dot-segment removal in `normalize()` and `equal()`. This makes encoded path data behave like real `/` and `..`, so distinct URIs collapse onto the same normalized path.\n\nFor example, `http://example.com/public/%2e%2e/admin` normalizes to `http://example.com/admin`, and `equal()` considers them the same URI.\n\nApplications that normalize or compare attacker-controlled URLs to enforce path-based policy can be bypassed. A path that looks confined under an allowed prefix can normalize to a different location.\n\n### Patches\n\nUpgrade to `fast-uri` >= 3.1.1, or if you are in the v2.x release line, v2.4.1\n\n### Workarounds\n\nNone. 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