{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93751", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-18T16:30:18.137Z", "datePublished": "2026-09-18T17:51:36.332Z", "dateUpdated": "2026-09-18T17:51:36.332Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-18T17:51:36.332Z"}, "datePublic": "2026-09-17T00:00:00.000Z", "title": "uri-js through 4.4.1 Improper UTF-8 Decoding via pctDecChars", "descriptions": [{"lang": "en", "value": "uri-js through 4.4.1 contains an improper UTF-8 decoding vulnerability in pctDecChars() that decodes invalid and overlong percent-encoded sequences into ASCII metacharacters. Attackers can craft percent-encoded payloads to bypass platform decoder validation and inject path traversal or CRLF sequences that downstream consumers process without filtering."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Handling of Unicode Encoding", "cweId": "CWE-176", "type": "CWE"}]}], "affected": [{"vendor": "garycourt", "product": "uri-js", "defaultStatus": "unaffected", "packageURL": "pkg:npm/uri-js", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "4.4.1"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:garycourt:uri-js:*:*:*:*:*:*:*:*", "versionEndIncluding": "4.4.1"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/garycourt/uri-js/issues/106", "tags": ["issue-tracking"], "name": "GitHub Issue #106"}, {"url": "https://github.com/garycourt/uri-js", "tags": ["product"]}, {"url": "https://github.com/garycourt/uri-js/blob/a1acf730b4bba3f1097c9f52e7d9d3aba8cdcaae/src/uri.ts#L103-L141", "name": "pctDecChars() masking bytes without continuation-byte validation", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: uri-js through 4.4.1 Improper UTF-8 Decoding via pctDecChars", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/uri-js-through-4.4.1-improper-utf-8-decoding-via-pctdecchars"}], "credits": [{"lang": "en", "value": "Wayde Shi (PayPal Cyber Security Team)", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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