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MEDIUM severity

taro-css-to-react-native Regular Expression Denial of Service vulnerabilityGHSA-f5xg-cfpj-2mw6

MEDIUMFix: NervJS/taro#17619

GHSA-f5xg-cfpj-2mw6 is a medium-severity (CVSS 4.3) Uncontrolled Resource Consumption vulnerability in taro-css-to-react-native. A fix is available for taro-css-to-react-native — see the affected versions and patch details below.

Also known asCVE-2025-5896
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for GHSA-f5xg-cfpj-2mw6.

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk+0.04%
Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk
0.01%0.42%0.83%1.24%0.7%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

21other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
taro-css-to-react-nativenpm
11Kdownloads / week

Description

A vulnerability was found in tarojs taro up to 4.1.1. It has been declared as problematic. This vulnerability affects unknown code of the file taro/packages/css-to-react-native/src/index.js. The manipulation leads to inefficient regular expression complexity. The attack can be initiated remotely. Upgrading to version 4.1.2 is able to address this issue. The name of the patch is c2e321a8b6fc873427c466c69f41ed0b5e8814bf. It is recommended to upgrade the affected component.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmtaro-css-to-react-nativeall versions4.1.2npm install taro-css-to-react-native@4.1.2

Affected Products

1 product · 1 configurations
Application
tarotaro
< 4.1.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for taro-css-to-react-native, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update taro-css-to-react-native to 4.1.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f5xg-cfpj-2mw6 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

A vulnerability was found in tarojs taro up to 4.1.1. It has been declared as problematic. This vulnerability affects unknown code of the file taro/packages/css-to-react-native/src/index.js. The manipulation leads to inefficient regular expression complexity. The attack can be initiated remotely. Upgrading to version 4.1.2 is able to address this issue. The name of the patch is c2e321a8b6fc873427c466c69f41ed0b5e8814bf. It is recommended to upgrade the affected component.
O3 Security · Impact-Aware SCA

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taro-css-to-react-native Regular Expression Denial of…