Medium 6.5Published Sep 18, 2026

CVE-2026-93751uri-js through 4.4.1 Improper UTF-8 Decoding via pctDecChars

Updated under an hour ago (2026-10-19 07:50 UTC)

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It affects garycourt uri-js. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for garycourt uri-js

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-176
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Sep 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

garycourt uri-js garycourt:uri_js (from the name)	through 4.4.1	CNA record

References

https://github.com/garycourt/uri-js/issues/106issue-tracking
https://github.com/garycourt/uri-jsproduct
https://github.com/garycourt/uri-js/blob/a1acf730b4bba3f1097c9f52e7d9d3aba8cdcaae/src/uri.ts#L103-L141technical-description
https://www.vulncheck.com/advisories/uri-js-through-4.4.1-improper-utf-8-decoding-via-pctdeccharsthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.