Allocation of Resources Without Limits or Throttling 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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Start learning- Snyk IDSNYK-JS-A2UIWEBCORE-21762016
- published28 Oct 2026
- disclosed28 Oct 2026
- creditez-lbz
Introduced: 28 Oct 2026
NewCVE-2026-118271 (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 Allocation of Resources Without Limits or Throttling in the resolveSignal method of the DataContext class. An attacker can exhaust the memory and CPU of the client by sending an updateComponents message with a function call that has thousands of arguments, because resolveSignal creates a signal, a computed value, and an effect for each argument before unused keys are stripped. The attacker must be able to send messages to the client, for example as a remote agent that the client connects to.