GHSA-6wj5-5pgr-jwq8: Open webui Denial of Service Vulnerability

HIGH
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CVSS 7.5
CWE-400
Published
Advisory Summary

GHSA-6wj5-5pgr-jwq8 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Open webui libraries in the PyPI ecosystem. The issue involves open webui unauthenticated multipart boundary denial of service (dos) vulnerability in api/chat/file. Remediation is available by upgrading affected packages to version 0.4.7.

GHSA-6wj5-5pgr-jwq8 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-6wj5-5pgr-jwq8
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Open webui
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix GHSA-6wj5-5pgr-jwq8

To remediate this vulnerability, upgrade all affected Open webui dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

open-webui fixed: 0.4.7 
pip install open-webui>=0.4.7
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show open-webui

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-6wj5-5pgr-jwq8, inspect your installed packages using pip:

pip show open-webui

Analyze the terminal output to locate any version of Open webui in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.4.7), your application is affected.

Note: The pip show open-webui command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Open webui, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A vulnerability in open-webui/open-webui version 79778fa allows an attacker to cause a Denial of Service (DoS) by uploading a file with a malformed multipart boundary. By appending a large number of characters to the end of the multipart boundary, the server continuously processes each character, rendering the application inaccessible. This issue can prevent all users from accessing the application until the server recovers.

GHSA-6wj5-5pgr-jwq8 Affected Open webui Versions

1 component(s)
Fixed Versions:
0.4.7
Product / Package Ecosystem Affected Versions Fixed Version
open-webui
pypi/open-webui
PyPI
< 0.4.7
0.4.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/Kludex/python-multipart/security/advisories/GHSA-59g5-xgcq-4qw3
NVD — GHSA-6wj5-5pgr-jwq8 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-53981
Security Fix Commit FIX COMMIT
https://github.com/open-webui/open-webui/commit/f311c03a21dc09e279a0cad7482a68b273517baf
Open webui Source Repository REPOSITORY
https://github.com/open-webui/open-webui
huntr.com/bounties/15eb4fbe-7... WEB
https://huntr.com/bounties/15eb4fbe-70d4-420e-806a-ec6f4ecb7202

Frequently Asked Questions

What is GHSA-6wj5-5pgr-jwq8?
GHSA-6wj5-5pgr-jwq8 is a security vulnerability in Open webui involving Open WebUI Unauthenticated Multipart Boundary Denial of Service (DoS) Vulnerability in api/chat/file under CWE-400: Uncontrolled Resource Consumption.
Which Open webui versions are affected?
Affected versions include releases prior to 0.4.7 across affected packages: open-webui.
What version fixes GHSA-6wj5-5pgr-jwq8?
Upgrading to 0.4.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is open-webui affected?
Yes, open-webui is affected in releases prior to 0.4.7. Upgrade your dependency to 0.4.7 or later.
What is the CVSS score of GHSA-6wj5-5pgr-jwq8?
GHSA-6wj5-5pgr-jwq8 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with GHSA-6wj5-5pgr-jwq8?
GHSA-6wj5-5pgr-jwq8 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for GHSA-6wj5-5pgr-jwq8?
Run the dependency tree command: 'pip show open-webui'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6wj5-5pgr-jwq8",
  "modified" : "2025-04-15T19:37:01Z",
  "published" : "2025-03-20T12:32:46Z",
  "aliases" : [ ],
  "summary" : "Open WebUI Unauthenticated Multipart Boundary Denial of Service (DoS) Vulnerability in api/chat/file",
  "details" : "A vulnerability in open-webui/open-webui version 79778fa allows an attacker to cause a Denial of Service (DoS) by uploading a file with a malformed multipart boundary. By appending a large number of characters to the end of the multipart boundary, the server continuously processes each character, rendering the application inaccessible. This issue can prevent all users from accessing the application until the server recovers.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "open-webui"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.4.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Kludex/python-multipart/security/advisories/GHSA-59g5-xgcq-4qw3"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-53981"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open-webui/open-webui/commit/f311c03a21dc09e279a0cad7482a68b273517baf"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/open-webui/open-webui"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/15eb4fbe-70d4-420e-806a-ec6f4ecb7202"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-21T21:17:35Z",
    "nvd_published_at" : "2025-03-20T10:15:38Z"
  }
}