OASB
Attacks/Parser Differential/PARSE-010
HIGHCWE-116

PARSE-010 Zero-Width Character Injection

Parser Differential: Exploits differences in how parsers (JSON, YAML, markdown) interpret the same input to bypass security controls

Description

Injects zero-width Unicode characters (ZWJ, ZWNJ, ZWSP) to create visually invisible text that bypasses content filters but is processed by the agent

Remediation

Strip zero-width characters from all input before processing. Apply content filters after Unicode normalization and zero-width removal.

Severity

HIGH

OASB Control

3.2

CWE

CWE-116