CVE-2026-93751

MEDIUMCVSS 6.5

Description

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.

Timeline

Published:September 18th, 2026 6:18 PM

Last modified:September 22nd, 2026 8:25 PM

CVSS Scoring

CVSS v3: 6.5 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weaknesses (CWE)

CWE-176

References & Reports

Advisories, patches, and third-party reports

https://github.com/garycourt/uri-js
https://github.com/garycourt/uri-js/blob/a1acf730b4bba3f1097c9f52e7d9d3aba8cdcaae/src/uri.ts#L103-L141
https://github.com/garycourt/uri-js/issues/106
https://www.vulncheck.com/advisories/uri-js-through-4.4.1-improper-utf-8-decoding-via-pctdecchars

Source: NIST NVD · Data may lag official sources by up to one minute