# CVE-2024-12534: PYSEC-2026-1733 - Open WebUI Uncontrolled Resource Consumption vulnerability

Source: https://junglewise.ai/threats/cve-2024-12534-open-webui-uncontrolled-resource-consumption-in-authentication  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-07. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2024-12534 · Severity: low · CVSS 3 · Published 2026-07-07

Open WebUI is a user-friendly interface for AI models. The application fails to validate the length of email and password inputs during sign-in, allowing attackers to submit extremely large payloads that exhaust server resources (CPU, memory, disk). This causes the service to become unavailable to legitimate users without requiring authentication.

Technologies: [open-webui (npm)](https://junglewise.ai/threats/technologies/npm-open-webui), [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui). Vendors: [npm](https://junglewise.ai/threats/vendors/npm), [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2024-12534 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-12534 being exploited in the wild.

**How severe is CVE-2024-12534?** Low severity, with a CVSS score of 3, published 7 July 2026.

**Which products and versions are affected?** open-webui (npm) SEMVER:introduced=0,last_affected=0.3.32; open-webui (PyPI) ECOSYSTEM:introduced=0,last_affected=0.3.32.

**Is there a fix for CVE-2024-12534?** 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-2024-12534 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2024-12534?** Check whether you run open-webui (npm) or open-webui (PyPI) at an affected version. 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

The vulnerability is an uncontrolled resource consumption (CWE-400) flaw in the authentication endpoint. The sign-in process does not enforce character length limits on email and password fields, allowing attackers to submit arbitrarily large strings. When processed, these oversized payloads exhaust server resources and trigger a denial-of-service condition. The attack is network-reachable and requires no authentication or user interaction. The vulnerable code is located in src/lib/apis/auths/index.ts (lines 113-142). Versions up to and including v0.3.32 are affected across both PyPI and npm distributions.

## Affected products

- Open WebUI Open WebUI 0.1.124 through 0.3.32

## Identifiers

- CVE-2024-12534
- GHSA-g3mx-83mp-3rwc
- PYSEC-2026-1733

## Timeline

- 2025-03-20: disclosed: Vulnerability published in GitHub Advisory Database and NVD
- 2025-03-21: other: GitHub security team review completed

## References

- [https://github.com/open-webui/open-webui](https://github.com/open-webui/open-webui)

## Related threats

- [Open WebUI OAuth token exchange authorization bypass](https://junglewise.ai/threats/cve-2026-88006-open-webui-oauth-token-exchange-authorization-bypass)
- [Open WebUI OAuth token exchange authorization bypass](https://junglewise.ai/threats/cve-2026-88005-open-webui-oauth-token-exchange-authorization-bypass)
- [Open WebUI infinite loop denial of service in chat history reconstruction](https://junglewise.ai/threats/cve-2026-88002-open-webui-infinite-loop-denial-of-service-in-chat-history)
- [Open WebUI server-side request forgery via unvalidated HTTP redirects](https://junglewise.ai/threats/cve-2026-88001-open-webui-server-side-request-forgery-via-unvalidated-http)
- [Open WebUI denial of service via cyclic chat tree message deletion](https://junglewise.ai/threats/cve-2026-88000-open-webui-denial-of-service-via-cyclic-chat-tree-message)