# CVE-2026-82285: BISHENG server-side request forgery in workflow callback API

Source: https://junglewise.ai/threats/cve-2026-82285-bisheng-server-side-request-forgery-in-workflow-callback-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-28. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-82285 · Severity: high · CVSS 8.2 · Published 2026-08-28

BISHENG is an open-source LLM DevOps platform for enterprise AI applications. An unauthenticated attacker can exploit a flaw in the workflow callback API to make the server request arbitrary URLs, allowing them to probe internal network services (including cloud metadata endpoints) and steal captured responses from cloud storage. This could expose internal systems and sensitive cloud credentials.

Technologies: [Dataelement BISHENG](https://junglewise.ai/threats/technologies/bisheng). Vendors: [Dataelement](https://junglewise.ai/threats/vendors/dataelement).

## Quick answers

**Is CVE-2026-82285 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82285 being exploited in the wild.

**How severe is CVE-2026-82285?** High severity, with a CVSS score of 8.2, published 28 August 2026.

**Which products and versions are affected?** Dataelement BISHENG through 2.6.0-fix2.

**Is there a fix for CVE-2026-82285?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-82285 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-82285?** Check whether you run Dataelement BISHENG at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a server-side request forgery (SSRF) in the POST /api/v1/workflow/report/callback endpoint. The endpoint lacks authentication checks and does not restrict URL schemes or filter hostnames, allowing unauthenticated attackers to supply arbitrary URLs. When invoked, the server fetches those URLs and stores responses in object storage. An attacker can enumerate internal network services and cloud metadata endpoints (e.g., AWS IMDSv1), then retrieve the captured responses by supplying caller-controlled object names. No patch availability is stated in the advisory.

## Affected products

- dataelement BISHENG through 2.6.0-fix2

## Timeline

- 2026-08-28: disclosed

## References

- [https://github.com/dataelement/bisheng](https://github.com/dataelement/bisheng)
- [https://github.com/dataelement/bisheng/blob/3f27641987c7363d2d7b7b1a8c3c3dbe09c60fd7/src/backend/bisheng/api/v1/workflow.py](https://github.com/dataelement/bisheng/blob/3f27641987c7363d2d7b7b1a8c3c3dbe09c60fd7/src/backend/bisheng/api/v1/workflow.py)

## Related threats

- [BISHENG insecure direct object reference in knowledge file API](https://junglewise.ai/threats/cve-2026-111363-bisheng-through-3-0-0-beta4-contains-an-insecure-direct-object)
- [bisheng code injection in validate.py](https://junglewise.ai/threats/cve-2026-51861-bisheng-2-3-0-2-4-0-and-2-4-0-beta1-is-vulnerable-to-code)
- [bisheng directory traversal in task_exec and cache utilities](https://junglewise.ai/threats/cve-2026-51860-bisheng-2-3-0-2-4-0-and-2-4-0-beta1-is-vulnerable-to-directory)
- [bisheng directory traversal in save_download_file](https://junglewise.ai/threats/cve-2026-51859-bisheng-2-3-0-2-4-0-and-2-4-0-beta1-is-vulnerable-to-directory)
- [DataElement BISHENG remote code execution in workflow run_once](https://junglewise.ai/threats/cve-2026-82278-dataelement-bisheng-remote-code-execution-in-workflow-run-once)