CVE-2026-93751CWE-176

CVE-2026-93751

Medium · published September 18, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
33.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
6.9 · 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
EPSS
0.00400 · 33.1th percentile
Weakness
CWE-176 · Improper Handling of Unicode Encoding
Published
2026-09-18T22:18Z
References (4)
https://github.com/garycourt/uri-js · [email protected]https://github.com/garycourt/uri-js/blob/a1acf730b4bba3f1097c9f52e7d9d3aba8cdcaae/src/uri.ts#L103-L141 · [email protected]https://github.com/garycourt/uri-js/issues/106 · [email protected]https://www.vulncheck.com/advisories/uri-js-through-4.4.1-improper-utf-8-decoding-via-pctdecchars · [email protected]
EPSS history
Timeline
  • 20 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 18 SEP 17:51Z
    uri-js through 4.4.1 Improper UTF-8 Decoding via pctDecChars
    cvelistv5