Uncontrolled Recursion Affecting @a2ui/web_core package, versions <0.12.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-A2UIWEBCORE-21762817
- published28 Oct 2026
- disclosed28 Oct 2026
- creditez-lbz
Introduced: 28 Oct 2026
NewCVE-2026-118275 (opens in a new tab)How to fix?
Upgrade @a2ui/web_core to version 0.12.0 or higher.
Overview
@a2ui/web_core is an A2UI Core Library
Affected versions of this package are vulnerable to Uncontrolled Recursion via DataContext.resolveDynamicValue and DataContext.resolveSignal in data-context.ts. When resolving DynamicValue payloads that contain nested function call objects ({ call: "...", args: { ... } }), both methods recurse through arguments without enforcing a maximum depth. An attacker who can supply a deeply nested expression payload (for example, 20,000 levels of nested function calls) triggers an unhandled RangeError: Maximum call stack size exceeded, crashing the renderer process or web worker on surface mounting.