Information Exposure in wandb OpenUI Server by Weights and Biases
CVE-2026-4994

5.1MEDIUM

Key Information:

Vendor

Wandb

Status
Openui
Vendor
CVE Published:
28 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4994?

A vulnerability exists in the wandb OpenUI prior to version 1.0/3.5-turb, specifically within the generic_exception_handler function in backend/openui/server.py. This vulnerability permits an attacker to manipulate function arguments, leading to exposure of sensitive information within error messages. The exploit requires access to the local network, allowing potential attackers to gather confidential data inadvertently divulged through these error messages. Despite early disclosures to the vendor, no response was received, raising concerns regarding the persistence of this vulnerability and its implications for user data security.

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Affected Version(s)

OpenUI 1.0

OpenUI 3.5-turb

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-2026-4994 - Proof of Concept

References

https://vuldb.com/?id.353881
vdb-entrytechnical-description
https://vuldb.com/?ctiid.353881
signaturepermissions-required
https://vuldb.com/?submit.778266
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
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
JSON
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