This vulnerability allows the unpack function of the wheel tool, which manipulates Python wheel files, to be exploited due to mishandling of file permissions. Specifically, in versions 0.40.0 through 0.46.1, the function fails to properly validate filenames sourced from the archive header during the chmod operation. As a result, it blindly trusts these filenames, which may have been sanitized earlier in the extraction process. This flaw enables attackers to craft malicious wheel files that, when unpacked, can alter permissions of critical system files, including /etc/passwd and SSH keys, facilitating privilege escalation or arbitrary code execution by making scripts writable.
The CVSS score for this vulnerability is 7.1, indicating a high severity level. Organizations utilizing affected versions of wheel should be aware of the potential risks associated with this vulnerability, which has been fixed in version 0.46.2. Failure to address this vulnerability could have severe consequences, as attackers may exploit it to gain unauthorized access or control over system resources.
Given the high exploitability of this vulnerability and its potential impact on system security, organizations should prioritize patching immediately. It is crucial to ensure that all environments are updated to version 0.46.2 or later to mitigate the risks posed by this vulnerability.
In summary, the wheel_project vulnerability CVE-2026-24049 presents a significant risk through file permission manipulation, and immediate remediation is necessary to protect against potential exploitation.
Vulnerability Details
The official description of the vulnerability notes that the issue arises from the unpack function of the wheel tool, which allows manipulation of Python wheel files as defined in PEP 427. The vulnerability affects all versions from 0.40.0 to 0.46.1 and has been classified under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) and CWE-732 (Incorrect Permission Assignment for Critical Resource).
The CVSS score of 7.1 categorizes this vulnerability as high severity, indicating that exploitation could lead to significant damage. The affected product is the wheel component from the wheel_project vendor, and the vulnerability was published on January 22, 2026.
Technical Analysis
The root cause of this vulnerability stems from inadequate validation of filenames during the extraction process. Attackers may utilize local access to exploit this vulnerability, leveraging low attack complexity and the necessity for user interaction. The permission modification that can occur via this vulnerability can lead to high integrity and availability impacts, making it critical for organizations to monitor their environments closely.
Specifically, the vulnerability permits attackers to gain write access to important files such as configuration files and system scripts, which can result in unauthorized changes and potential control over the system. This vulnerability does not require elevated privileges to exploit, increasing its risk factor.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access to critical system files and the ability to execute arbitrary code. The blast radius of this vulnerability could affect any system utilizing the vulnerable versions of the wheel tool, particularly in environments where local access is possible. Given the nature of the vulnerabilities and their impact, organizations should assess their risk posture and prioritize remediation efforts.
With the CVSS score being high, organizations must act swiftly to address this issue, particularly given that the exploitability of this vulnerability is categorized as high. Regular updates and proactive security measures should be in place to prevent such vulnerabilities from being exploited.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions of the wheel tool range from 0.40.0 through 0.46.1. Organizations are advised to upgrade to version 0.46.2 or later to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
Organizations should immediately apply the patch available in version 0.46.2 of the wheel tool to eliminate this vulnerability. In addition to patching, organizations should also review their security practices surrounding the use of third-party Python packages to ensure similar vulnerabilities are not present.
For those unable to apply the patch immediately, consider implementing additional network controls and monitoring systems to detect potential exploitation attempts. Furthermore, it is advisable to conduct a thorough review of file permissions for critical system files to ensure they are properly secured.
Organizations should consider validating their remediation strategies through penetration testing to ensure that their systems remain secure against similar vulnerabilities.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor for unusual file permission changes, especially for critical system files such as /etc/passwd and SSH keys. Additionally, any unexpected behavior in scripts or applications that handle Python wheel files should be scrutinized.
Log indicators should include any failed or unauthorized attempts to modify file permissions, as well as monitoring for the presence of malicious wheel files in the environment.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability highlights the need for continuous improvement in security practices surrounding package management in Python. As the use of third-party libraries becomes more prevalent, it is imperative for security teams to adopt robust practices to mitigate risks associated with file permission vulnerabilities.
This vulnerability serves as a reminder of the potential dangers inherent in trusting file metadata without proper validation. Organizations must establish stringent validation processes to ensure that file permissions are correctly managed.
For further insights on securing Python environments and mitigating risks associated with package management, organizations can refer to the following resources: penetration testing methodologies, vulnerability management best practices, and API security testing guidelines.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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