AIKIDO-2026-193864
@swc/core is vulnerable to Denial of Service (DoS)
35
Low Risk
This Affects:
@swc/coreTL;DR
The SWC ECMAScript lexer and JSX parser panic when they decode a JSX text entity that resolves to a lone or invalid UTF-16 surrogate code point, crashing the process compiling the source file. Because @swc/core parses and transforms arbitrary JavaScript, TypeScript, and JSX source during builds, bundling, and CI pipelines, a crafted or malformed JSX file that reaches the compiler triggers this crash. The fix rejects the malformed surrogate entity with a parse error instead of panicking, avoiding the crash.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range, and you parse JSX source that may contain untrusted or externally supplied content.
Background info
@swc/core is vulnerable to Denial of Service (DoS) in versions 1.0.11 - 1.15.47.
How to fix this
Upgrade the @swc/core library to the patch version.
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