Server-Side Request Forgery Vulnerability in bigsk1 OpenAI Realtime UI
CVE-2026-5803

5.3MEDIUM

Key Information:

Vendor

Bigsk1

Status
Openai-realtime-ui
Vendor
CVE Published:
8 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5803?

A security flaw has been identified in the bigsk1 OpenAI Realtime UI affecting its API Proxy Endpoint, specifically within the server.js file. This vulnerability allows a remote attacker to exploit an unknown function by manipulating the argument Query, enabling server-side request forgery. The attack vector can be triggered remotely, posing significant risks. Continuous delivery with rolling releases means that affected or updated versions may not be specifically listed. A patch has been issued for this flaw, and it is highly recommended that users apply the relevant updates promptly to secure their environments.

Affected Version(s)

openai-realtime-ui 188ccde27fdf3d8fab8da81f3893468f53b2797c

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-2026-5803 - Proof of Concept

References

https://vuldb.com/vuln/356242
vdb-entrytechnical-description
https://vuldb.com/vuln/356242/cti
signaturepermissions-required
https://vuldb.com/submit/786984
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
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

BruceJin (VulDB User)
.