---
id: "CVE-2026-118273"
kind: "vulnerability"
aliases: ["CVE-2026-118273"]
title: "a2ui: DataModel.set flaw lets remote input exhaust resources"
severity: "medium"
cvss: 4.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["a2ui", "package", "typescript", "web-renderer"]
not_affected_if: ["patched-version", "renderer-not-used"]
published_at: "2026-10-28T03:17:12+00:00"
first_seen_at: "2026-10-28T03:31:02+00:00"
updated_at: "2026-10-28T03:32:57+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118273", "first_seen_at": "2026-10-28T03:31:02+00:00"}]
---

# a2ui: DataModel.set flaw lets remote input exhaust resources

The a2ui web renderer's DataModel.set function in renderers/web_core can be manipulated to consume excessive resources. A remote attacker can trigger it, and a public exploit has been published, which can slow or stall the affected renderer.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether your project depends on the a2ui web_core renderer and which version it pins, for example with `npm ls` in the project directory.
- Check whether the renderers/web_core/src/v0_9/state/data-model.ts file in your copy contains the vulnerable DataModel.set code.

## Fix

- Apply patch commit `82789191ce551f4d7a095d273773fb24bd764c9d` from the a2ui-project repository.
- Move to a release newer than `0.10.6`; the fixed version number is unknown.

## Timeline

- 2026-10-28T03:31:02+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118273

## From the sources

A flaw has been found in a2ui-project a2ui up to 0.10.6. Affected by this vulnerability is the function DataModel.set of the file renderers/web_core/src/v0_9/state/data-model.ts. Executing a manipulation can lead to resource consumption. It is possible to launch the attack remotely. The exploit has been published and may be used. This patch is called 82789191ce551f4d7a095d273773fb24bd764c9d. A patch should be applied to remediate this issue.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_