Stealjs

Stealjs is a JavaScript framework and build utility whose vulnerability footprint, though modest in volume, sits at an elevated prominence in the software supply chain as a dependency embedded in web applications and build pipelines. The vendor's disclosures skew strongly toward critical-severity outcomes and recur through prototype-pollution and regular-expression-complexity weaknesses that reflect the dynamic nature of JavaScript object manipulation and parsing challenges inherent to a meta-programming framework. Defenders should treat this vendor's advisories as high-priority given the severity tendency and the potential for downstream impact across dependent codebases; live exploitation activity, exposure scope, and current severity figures are shown alongside this summary.