Information disclosure in Openbmb Xagent
CVE-2026-4957
A flaw has been found in OpenBMB XAgent 1.0.0. The impacted element is the function FunctionHandler.handle_tool_call of the file XAgent/function_handler.py of the component API Key Handler. This manipulation of the argument api_key causes sensitive information in log files. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Openbmb Xagent — versions 1.0.0
Weakness classification (CWE)
References
- vuldb.com/ (Permissions Required, technical-description, VDB Entry, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (Third Party Advisory, Issue Tracking, third-party-advisory)
- gist.github.com/YLChen-007/6279f3de0c2dff7732eaaf820843b562 (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-4957?
- CVE-2026-4957 is a low-severity vulnerability in Openbmb Xagent, classified under Information Disclosure. CVSS score: 2.7/10. Published 2026-03-27.
- How severe is CVE-2026-4957?
- Low severity. CVSS v3 base score is 2.7 out of 10.