Regular Expression Denial of Service in Acorn

Description

Affected versions of acorn are vulnerable to Regular Expression Denial of Service. A regex in the form of /[x-\ud800]/u causes the parser to enter an infinite loop. The string is not valid UTF16 which usually results in it being sanitized before reaching the parser.

Recommendation

Update the acorn package to the latest compatible version. Followings are version details:

• Affected version(s): **>= 5.5.0, < 5.7.4

  >= 7.0.0, < 7.1.1

  >= 6.0.0, < 6.4.1**

• Patched version(s): **5.7.4

  7.1.1

  6.4.1**

References

• GHSA-6chw-6frg-f759
• snyk.io
• www.npmjs.com
• CWE-400