Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2025-27789— Inefficient RexExp complexity in generated code with .replace when transpiling named capturing groups

Quick assessment

Affected
babel babel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Babel是Babel开源的一个 JavaScript 的编译器。 Babel 7.26.10之前版本和8.0.0-alpha.17之前版本存在安全漏洞，该漏洞源于编译正则表达式命名捕获组时生成的.replace方法在某些特定替换模式字符串上具有二次复杂度，可能导致资源消耗增加。

CVSS 6.2 · Medium EPSS 0.56% · P45

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-27789

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Inefficient RexExp complexity in generated code with .replace when transpiling named capturing groups
Source: CVE Program / CVE List V5
Vulnerability Description
Babel is a compiler for writing next generation JavaScript. When using versions of Babel prior to 7.26.10 and 8.0.0-alpha.17 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`). Generated code is vulnerable if all the following conditions are true: Using Babel to compile regular expression named capturing groups, using the `.replace` method on a regular expression that contains named capturing groups, and the code using untrusted strings as the second argument of `.replace`. This problem has been fixed in `@babel/helpers` and `@babel/runtime` 7.26.10 and 8.0.0-alpha.17. It's likely that individual users do not directly depend on `@babel/helpers`, and instead depend on `@babel/core` (which itself depends on `@babel/helpers`). Upgrading to `@babel/core` 7.26.10 is not required, but it guarantees use of a new enough `@babel/helpers` version. Note that just updating Babel dependencies is not enough; one will also need to re-compile the code. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Babel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Babel是Babel开源的一个 JavaScript 的编译器。 Babel 7.26.10之前版本和8.0.0-alpha.17之前版本存在安全漏洞，该漏洞源于编译正则表达式命名捕获组时生成的.replace方法在某些特定替换模式字符串上具有二次复杂度，可能导致资源消耗增加。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
babel babel < 7.26.10 -

II. Public POCs for CVE-2025-27789

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-27789

请登录查看更多情报信息。

Patches & Fixes for CVE-2025-27789 (1)

Vendor Advisories for CVE-2025-27789 (1)

IV. Related Vulnerabilities

Same product: babel
Same vendor: babel
Same weakness: CWE-1333

V. Comments for CVE-2025-27789

No comments yet

Leave a comment