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CVE-2026-7676: Low Vulnerability in kerwincui FastBee

A low-severity path traversal vulnerability exists in kerwincui FastBee up to version 1.2.1. Attackers may exploit this flaw remotely, affecting the Tool Download Endpoint. Immediate patching is advised.

LOWCVSS 2.1 · Published May 3, 2026

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A vulnerability was found in kerwincui FastBee up to version 1.2.1. The affected element is the function ToolController.download of the file springboot/fastbee-open-api/src/main/java/com/fastbee/data/controller/ToolController.java of the component Tool Download Endpoint. The manipulation of the argument fileName results in path traversal. The attack may be performed from remote. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

The severity level of this vulnerability is classified as low, with a CVSS score of 2.1. Despite its low classification, organizations should not overlook this vulnerability, as path traversal vulnerabilities can lead to unauthorized access to sensitive files and data.

Given the nature of this vulnerability, attackers may leverage it to access files outside the intended directory structure. This can potentially lead to data exfiltration or exposure of sensitive internal configurations.

Organizations should prioritize patching immediately to mitigate the risk associated with this vulnerability, ensuring that their systems are not exposed to potential exploitation.

Vulnerability Details

The vulnerability in kerwincui FastBee is characterized by the ability to manipulate the fileName argument, resulting in path traversal. The official CVE description indicates that the attack vector is network-based, with low attack complexity and low privileges required.

The CVSS version 4.0 score indicates a base score of 2.1, reaffirming its low severity classification. The vulnerability falls under CWE-22, which pertains to improper limitation of a pathname to a restricted directory.

Technical Analysis

The root cause of this vulnerability lies in the improper handling of user input in the Tool Download Endpoint, allowing remote attackers to traverse directories. The attack complexity is rated as low because minimal effort is required to exploit this flaw.

Attackers may leverage this vulnerability without requiring any user interaction, making it a significant concern for organizations running affected versions of FastBee.

Risk & Impact Analysis

Risk to organizations includes unauthorized access to sensitive files, which could lead to data breaches or exposure of confidential information. The blast radius for this vulnerability can be extensive, especially for organizations with critical data stored in accessible directories.

Organizations should schedule remediation as part of their priority patch cycle to address this vulnerability. Given its public disclosure, the urgency to patch is heightened to prevent potential exploitation.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

All versions of kerwincui FastBee prior to 1.2.1 are affected by this vulnerability.

Mitigation & Remediation

Organizations should promptly apply patches to mitigate the vulnerability. Ensure that all systems are upgraded to the latest version of kerwincui FastBee to protect against potential exploitation.

In cases where a patch is not immediately available, implementing configuration hardening measures to limit access to sensitive directories may help mitigate the risk.

For ongoing protection, organizations should consider engaging in penetration testing to identify and remediate similar vulnerabilities in their applications.

Detection Guidance

Monitoring for unusual file access patterns and signs of directory traversal attempts can help in detecting potential exploitation attempts.

Organizations should review logs for any anomalies associated with the Tool Download Endpoint to ensure that no unauthorized access has occurred.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2026-7676 highlights the ongoing risks associated with path traversal vulnerabilities in web applications. As organizations increasingly rely on automated tools for deployment, ensuring proper input validation remains crucial.

This vulnerability serves as a reminder for security teams to maintain vigilance in application security practices, including regular code reviews and security testing.

For further insights and best practices, organizations can refer to the following resources: penetration testing methodology, vulnerability management program design, and API penetration testing guide to strengthen their security posture.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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