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

Quick assessment

Affected
garycourt uri-js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

uri-js 在 4.4.1 版本之前的所有版本均存在一个不当的 UTF-8 解码漏洞，位于 函数中。该函数会将无效或过长的百分号编码序列错误地解码为 ASCII 元字符。攻击者可以构造特制的百分号编码载荷，从而绕过平台解码器的验证，并注入路径遍历或 CRLF 序列，而下游消费者在处理这些序列时未进行过滤，由此导致安全漏洞。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1595 · Active Scanning

Affected Version Matrix 1

VendorProduct Version RangeStatus
garycourt uri-js ≤ 4.4.1 affected
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I. Basic Information for CVE-2026-93751

Vulnerability Information
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Vulnerability Title
uri-js through 4.4.1 Improper UTF-8 Decoding via pctDecChars
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Unicode编码处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
garycourt uri-js 0 ~ 4.4.1 -

II. Public POCs for CVE-2026-93751

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III. Intelligence Information for CVE-2026-93751

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Other References for CVE-2026-93751 (4)

IV. Related Vulnerabilities

Same product: uri-js
Same vendor: garycourt
Same weakness: CWE-176

V. Comments for CVE-2026-93751

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