How severe is CVE-2026-4957?

CVE-2026-4957 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-4957 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4957?

CVE-2026-4957 affects Openbmb Xagent. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4957?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-4957 have an EU (EUVD) identifier?

Yes. CVE-2026-4957 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16658.

When was CVE-2026-4957 published?

CVE-2026-4957 was published on 2026-03-27 and last updated on 2026-06-17.

CVE-2026-4957

CVE-2026-4957 is a low-severity vulnerability in Openbmb Xagent with a CVSS 3.x base score of 2.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-532.

Key facts

Severity: Low (CVSS 3.x base score 2.7)
CVSS v2: 3.3
CVSS v4: 2.0
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16658
Weakness: CWE-532
Affected product: Openbmb Xagent
Published: 2026-03-27
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-4957?: CVE-2026-4957 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-4957 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4957?: CVE-2026-4957 affects Openbmb Xagent. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4957?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4957 have an EU (EUVD) identifier?: Yes. CVE-2026-4957 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16658.
When was CVE-2026-4957 published?: CVE-2026-4957 was published on 2026-03-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openbmb:xagent:1.0.0:*:*:*:*:*:*:*

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