CWE-86Variant

Improper Neutralization of Invalid Characters in Identifiers in Web Pages

Draft in the CWE catalog · 10 CVEs mapped

10
CVEs mapped
5.4
Median CVSS
What it is

The product does not neutralize or incorrectly neutralizes invalid characters or byte sequences in the middle of tag names, URI schemes, and other identifiers.

Recent examples
6.1cvss
CVE-2026-71478

CVE-2026-71478 - MEDIUM Severity Vulnerability

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 1.5.0 until 2.9.0, the AttributesExtension's href and src unsafe-link filter can be bypassed by embedding control bytes, such as a tab, carriage return, line feed, or leading C0 control character, in a javascript: URL that browsers discard before parsing the scheme, causing the browser to still execute the script even when the unsafe-link filter is enabled. This issue is fixed in 2.9.0.

MEDIUMno explanation yet
0%
epss
4.4cvss
CVE-2026-28417

Vim has OS Command Injection in netrw

Vim is an open source, command line text editor. Prior to version 9.2.0073, an OS command injection vulnerability exists in the `netrw` standard plugin bundled with Vim. By inducing a user to open a crafted URL (e.g., using the `scp://` protocol handler), an attacker can execute arbitrary shell commands with the privileges of the Vim process. Version 9.2.0073 fixes the issue.

MEDIUMno explanation yet
1%
epss
2.1cvss
CVE-2025-66606

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product does not properly encode URLs. An attacker could tamper with web pages or execute malicious scripts. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04

LOWno explanation yet
0%
epss
The record
Technical detail
CWE ID
CWE-86
Abstraction
Variant
Structure
Simple
Status
Draft