CVE-2026-0767: Withdrawn Advisory Open WebUI/ZDI-CAN-28259 Vulnerability

MODERATE
Advisory Identifier: GHSA-vh96-p962-544h
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CVSS 5.3
CWE-319
Published
Advisory Summary

CVE-2026-0767 is a MODERATE (CVSS 5.3) open webui/zdi-can-28259 vulnerability (CWE-319: Cleartext Transmission of Sensitive Information) affecting Withdrawn Advisory libraries in the PyPI ecosystem. The issue involves open webui/zdi-can-28259. Remediation is available in the latest vendor maintenance releases.

CVE-2026-0767 at a Glance

CVE Identifier CVE-2026-0767
GHSA Identifier GHSA-vh96-p962-544h
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-319: Cleartext Transmission of Sensitive Information
Affected Product Withdrawn Advisory
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.3

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

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

How to Fix CVE-2026-0767

To remediate this vulnerability, upgrade all affected Withdrawn Advisory dependencies to a patched release.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: Latest secure release 
pip install open-webui>=Latest secure release
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 CVE-2026-0767, inspect your installed packages using pip:

pip show open-webui

Analyze the terminal output to locate any version of Withdrawn Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-319: Cleartext Transmission of Sensitive Information, where the product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. In Withdrawn Advisory, 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

### Withdrawn Advisory This advisory has been withdrawn because it does not describe a valid vulnerability. This link is maintained to preserve external references. ### Original Description Open WebUI Cleartext Transmission of Credentials Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Open WebUI. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of credentials provided to the endpoint. The issue results from transmitting sensitive information in plaintext. An attacker can leverage this vulnerability to disclose transmitted credentials, leading to further compromise. Was ZDI-CAN-28259.

CVE-2026-0767 Affected Withdrawn Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
open-webui
pypi/open-webui
PyPI
≤ 0.6.33

References

NVD — CVE-2026-0767 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0767
www.zerodayinitiative.com/advisories/zdi-26-0... WEB
https://www.zerodayinitiative.com/advisories/ZDI-26-033

Frequently Asked Questions

What is CVE-2026-0767?
CVE-2026-0767 is a security vulnerability in Withdrawn Advisory involving Open WebUI/ZDI-CAN-28259 under CWE-319: Cleartext Transmission of Sensitive Information.
Which Withdrawn Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: open-webui.
What version fixes CVE-2026-0767?
Upgrading to current release patches (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 Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-0767?
CVE-2026-0767 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-0767?
CVE-2026-0767 is classified under CWE-319: Cleartext Transmission of Sensitive Information (The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.).
How can I check PyPI dependencies for CVE-2026-0767?
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-vh96-p962-544h",
  "modified" : "2026-09-02T20:48:54Z",
  "published" : "2026-01-23T06:31:24Z",
  "withdrawn" : "2026-09-02T20:48:53Z",
  "aliases" : [ "CVE-2026-0767" ],
  "summary" : "Withdrawn Advisory: Open WebUI/ZDI-CAN-28259",
  "details" : "### Withdrawn Advisory\nThis advisory has been withdrawn because it does not describe a valid vulnerability. This link is maintained to preserve external references.\n\n### Original Description\nOpen WebUI Cleartext Transmission of Credentials Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Open WebUI. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the handling of credentials provided to the endpoint. The issue results from transmitting sensitive information in plaintext. An attacker can leverage this vulnerability to disclose transmitted credentials, leading to further compromise. Was ZDI-CAN-28259.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "open-webui"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.6.33"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-0767"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-26-033"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-319" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-02T20:48:53Z",
    "nvd_published_at" : "2026-01-23T04:16:03Z"
  }
}