Hard-coded Credentials Vulnerability in Weights and Biases OpenUI
CVE-2026-4993

4.8MEDIUM

Key Information:

Vendor

Wandb

Status
Openui
Vendor
CVE Published:
28 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4993?

A significant security flaw has been identified in Weights and Biases OpenUI affecting versions up to 1.0, specifically within the file backend/openui/config.py. This vulnerability arises from the manipulation of the argument LITELLM_MASTER_KEY, which leads to the exposure of hard-coded credentials. Attackers exploiting this vulnerability need local access, making it vital for users to assess their environment for this potential risk. The vulnerability has been publicly disclosed, yet the vendor has not issued a response to the findings.

Affected Version(s)

OpenUI 0.0.0

OpenUI 1.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-4993 - Proof of Concept

References

https://vuldb.com/?id.353880
vdb-entrytechnical-description
https://vuldb.com/?ctiid.353880
signaturepermissions-required
https://vuldb.com/?submit.778265
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric-b (VulDB User)
VulDB
.