HTML Injection Vulnerability in wandb OpenUI by Weights & Biases
CVE-2026-4992

5.3MEDIUM

Key Information:

Vendor

Wandb

Status
Openui
Vendor
CVE Published:
27 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4992?

A security flaw has been identified in wandb OpenUI, specifically within the HTMLAnnotator Component's function create_share/get_share located in the file backend/openui/server.py. By manipulating the argument ID, an attacker can conduct an HTML injection attack, allowing for the execution of malicious code remotely. The exploit has been documented and is available for public use. Despite early disclosure efforts, Weights & Biases has not responded to address this vulnerability, raising concerns about potential misuse.

Affected Version(s)

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-2026-4992 - Proof of Concept

References

https://vuldb.com/?id.353879
vdb-entrytechnical-description
https://vuldb.com/?ctiid.353879
signaturepermissions-required
https://vuldb.com/?submit.778264
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric-b (VulDB User)
VulDB
.