The Axios JavaScript package, a popular HTTP client used for browser and Node.js server projects, has been found to have a Denial of Service (DoS) vulnerability affecting all versions up to 0.19.0, which can cause increased I/O and CPU usage, potentially leading to disastrous effects on single-threaded servers or end-users in browser environments. A fix was released in version 0.19.0 and is available for users who apply the security patch for versions >= 0.17.0 of axios. The vulnerability was discovered as early as 2017 by developer Jeremy Apthorp, but no official fix was published until recently. Snyk identified the vulnerability in over 215,000 projects scanned and alerted relevant users to take action, emphasizing the importance of addressing this issue due to its potential impact on application runtime code flow and security issues. Open source project health is also highlighted, with the axios project receiving contributions from many developers but still facing challenges in maintaining stable releases and bug fixes.