GHSA-968p-4wvh-cqc8

Source

https://github.com/advisories/GHSA-968p-4wvh-cqc8

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-968p-4wvh-cqc8/GHSA-968p-4wvh-cqc8.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-968p-4wvh-cqc8

Aliases

CVE-2025-27789

Downstream

MINI-3m2g-rh76-6767

MINI-9hc9-2fp5-grrq

Related

Published

2025-03-11T20:30:18Z

Modified

2025-04-16T15:39:50Z

Severity

6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

Babel has inefficient RegExp complexity in generated code with .replace when transpiling named capturing groups

Details

Impact

When using Babel to compile regular expression named capturing groups, Babel will generate a polyfill for the .replace method that has quadratic complexity on some specific replacement pattern strings (i.e. the second argument passed to .replace).

Your generated code is vulnerable if all the following conditions are true: - You use Babel to compile regular expression named capturing groups - You use the .replace method on a regular expression that contains named capturing groups - Your code uses untrusted strings as the second argument of .replace

If you are using @babel/preset-env with the <code>targets</code> option, the transform that injects the vulnerable code is automatically enabled if: - you use duplicated named capturing groups, and target any browser older than Chrome/Edge 126, Opera 112, Firefox 129, Safari 17.4, or Node.js 23 - you use any named capturing groups, and target any browser older than Chrome 64, Opera 71, Edge 79, Firefox 78, Safari 11.1, or Node.js 10

You can verify what transforms @babel/preset-env is using by enabling the <code>debug</code> option.

Patches

This problem has been fixed in @babel/helpers and @babel/runtime 7.26.10 and 8.0.0-alpha.17, please upgrade. It's likely that you do not directly depend on @babel/helpers, and instead you depend on @babel/core (which itself depends on @babel/helpers). Upgrading to @babel/core 7.26.10 is not required, but it guarantees that you are on a new enough @babel/helpers version.

Please note that just updating your Babel dependencies is not enough: you will also need to re-compile your code.

Workarounds

If you are passing user-provided strings as the second argument of .replace on regular expressions that contain named capturing groups, validate the input and make sure it does not contain the substring $< if it's then not followed by > (possibly with other characters in between).

References

This vulnerability was reported and fixed in https://github.com/babel/babel/pull/17173.

Database specific

{
    "cwe_ids": [
        "CWE-1333"
    ],
    "nvd_published_at": "2025-03-11T20:15:18Z",
    "github_reviewed_at": "2025-03-11T20:30:18Z",
    "github_reviewed": true,
    "severity": "MODERATE"
}

References

Affected packages

npm / @babel/helpers

Package

Name: @babel/helpers; View open source insights on deps.dev
Purl: pkg:npm/%40babel/helpers

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

7.26.10

npm / @babel/runtime

Package

Name: @babel/runtime; View open source insights on deps.dev
Purl: pkg:npm/%40babel/runtime

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

7.26.10

npm / @babel/runtime-corejs2

Package

Name: @babel/runtime-corejs2; View open source insights on deps.dev
Purl: pkg:npm/%40babel/runtime-corejs2

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

7.26.10

npm / @babel/runtime-corejs3

Package

Name: @babel/runtime-corejs3; View open source insights on deps.dev
Purl: pkg:npm/%40babel/runtime-corejs3

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

7.26.10

npm / @babel/helpers

Package

Name: @babel/helpers; View open source insights on deps.dev
Purl: pkg:npm/%40babel/helpers

Affected ranges

Type: SEMVER
Events: Introduced

8.0.0-alpha.0

Fixed

8.0.0-alpha.17

Database specific

{
    "last_known_affected_version_range": "< 8.0.0-alpha.16"
}

npm / @babel/runtime

Package

Name: @babel/runtime; View open source insights on deps.dev
Purl: pkg:npm/%40babel/runtime

Affected ranges

Type: SEMVER
Events: Introduced

8.0.0-alpha.0

Fixed

8.0.0-alpha.17

Database specific

{
    "last_known_affected_version_range": "< 8.0.0-alpha.16"
}

npm / @babel/runtime-corejs2

Package

Name: @babel/runtime-corejs2; View open source insights on deps.dev
Purl: pkg:npm/%40babel/runtime-corejs2

Affected ranges

Type: SEMVER
Events: Introduced

8.0.0-alpha.0

Fixed

8.0.0-alpha.17

Database specific

{
    "last_known_affected_version_range": "< 8.0.0-alpha.16"
}

npm / @babel/runtime-corejs3

Package

Name: @babel/runtime-corejs3; View open source insights on deps.dev
Purl: pkg:npm/%40babel/runtime-corejs3

Affected ranges

Type: SEMVER
Events: Introduced

8.0.0-alpha.0

Fixed

8.0.0-alpha.17

Database specific

{
    "last_known_affected_version_range": "< 8.0.0-alpha.16"
}