Open WebUI Uncontrolled Resource Consumption vulnerability

published 2025-03-20 last yr. modified 2026-07-07 4mo ago also CVE-2024-12537 , PYSEC-2026-1728

cvss: 7.5; version 3.0, GitHub
cisa kev: Not listed; not in CISA's catalog
epss: —; no score, EPSS covers CVEs only
public exploits: 0; none known

In version 0.3.32 of open-webui/open-webui, the absence of authentication mechanisms allows any unauthenticated attacker to access the `api/v1/utils/code/format` endpoint. If a malicious actor sends a POST request with an excessively high volume of content, the server could become completely unresponsive. This could lead to severe performance issues, causing the server to become unresponsive or experience significant degradation, ultimately resulting in service interruptions for legitimate users.

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CVSS scores

assigned by	version	score	vector
GitHub	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	open-webui	<=0.3.32	no fix listed
npm	open-webui	<=0.3.32	no fix listed

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption
CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

GitHub Advisory GHSA-chf7-q7m5-fq92
OSV PYSEC-2026-1728

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