# CVE-2026-92114: a2ui Basic Catalog ReDoS in regex validation function

Source: https://junglewise.ai/threats/cve-2026-92114-a2ui-basic-catalog-redos-in-regex-validation-function  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-92114 · Severity: medium · CVSS 5.3 · Published 2026-09-15

a2ui is a web framework that renders UI components based on agent-supplied specifications. The Basic Catalog component accepts regular expression patterns from remote agents and executes them during form validation. An attacker can freeze the user's browser tab by sending a malicious regex pattern that causes excessive backtracking, rendering the application unusable until the browser recovers or the tab is closed.

## Quick answers

**Is CVE-2026-92114 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-92114 being exploited in the wild.

**How severe is CVE-2026-92114?** Medium severity, with a CVSS score of 5.3, published 15 September 2026.

**Which products and versions are affected?** a2ui-project a2ui up to 0.10.6.

**Is there a fix for CVE-2026-92114?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-92114 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-92114?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a Regular Expression Denial of Service (ReDoS) vulnerability (CWE-1333) in the `regex` validation function of a2ui's Basic Catalog component. The vulnerable code in `basic_catalog/functions/basic_functions.ts` accepts arbitrary regex patterns from agent-supplied specifications and executes them via `new RegExp(pattern).test(value)` without validation or complexity constraints. The regex validation is triggered on every keystroke in bound input fields (TextField), causing catastrophic backtracking on carefully crafted patterns like `(a+)+b`. Attack requires network access to send a malicious component spec; no authentication or user interaction beyond typing is required. An attacker can freeze the renderer's main thread indefinitely, causing complete client-side availability loss. Versions up to 0.10.6 are affected; the issue is tracked in the project but remediation status is unknown.

## Affected products

- a2ui-project a2ui up to 0.10.6

## Timeline

- 2026-09-15: disclosed
- other: Issue reported on GitHub on 2026-08-17

## References

- [https://github.com/a2ui-project/a2ui/](https://github.com/a2ui-project/a2ui/)
- [https://github.com/a2ui-project/a2ui/issues/2292](https://github.com/a2ui-project/a2ui/issues/2292)