This vulnerability allows logging of sensitive data, specifically the shared HMAC secret and expected signature, in RustFS versions from >= 1.0.0-alpha.1 to 1.0.0-alpha.79. This exposure can lead to forged RPC calls, jeopardizing the integrity of the system. The vulnerability has been assigned a CVSS score of 2.9, categorizing it as low severity, yet it is critical for users of RustFS to take action.
Risk to organizations includes potential unauthorized access and manipulation through forged requests, particularly affecting those who rely on the RPC functionality of RustFS. Organizations should prioritize patching immediately to mitigate these risks.
This vulnerability has been publicly disclosed and is fixed in version 1.0.0-alpha.80. However, as of now, there are no known exploits in the wild, and it is not part of the Known Exploited Vulnerabilities (KEV) catalog.
Organizations using affected versions should schedule remediation as soon as possible to prevent any potential exploitation.
Vulnerability Details
RustFS is a distributed object storage system built in Rust. The vulnerability arises from invalid RPC signatures that cause the server to log sensitive data, specifically the HMAC secret and the expected signature. These logs can expose the secrets to unauthorized readers, enabling attackers to forge RPC calls.
This issue is classified under CWE-532, indicating improper logging of sensitive information. The vulnerability was published on January 16, 2026, and has been analyzed thoroughly.
The CVSS 3.1 score is 7.5, suggesting a high severity level due to the potential high confidentiality impact. However, the overall assessment leads to a classification of low urgency, given the absence of active exploitation.
Technical Analysis
The root cause of this vulnerability lies in the logging behavior of the RPC request handlers. When invalid signatures are processed, the code writes sensitive data to the log, which is a critical security oversight. The attack vector is network-based, and the attack complexity is low, allowing for easy exploitation under certain conditions.
No privileges are required to exploit this vulnerability, and user interaction is not necessary. This makes the vulnerability particularly concerning, as it can be triggered by any invalidly signed request.
The confidentiality impact is assessed as high due to the logging of the HMAC secret, while integrity and availability impacts are none. The function that logs this sensitive data is reachable from both RPC and admin request handlers, increasing its exposure.
Risk & Impact Analysis
Organizations that deploy RustFS versions affected by this vulnerability should be aware of the potential risks. The exposure of sensitive HMAC secrets could lead to unauthorized access and compromise the integrity of data stored within the system.
The blast radius is significant, as any service utilizing the affected versions could be impacted. Security teams should assess their deployments and ensure that proper logging practices are implemented to avoid exposing sensitive information.
Given the CVSS score and the lack of known exploits, the urgency for remediation is moderate. Organizations should schedule patches as part of their routine maintenance.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of RustFS range from 1.0.0-alpha.1 to 1.0.0-alpha.79. Users are encouraged to upgrade to version 1.0.0-alpha.80 or later to mitigate this vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should update to RustFS version 1.0.0-alpha.80 or later. If immediate patching is not possible, consider implementing logging controls to prevent sensitive data exposure.
Configuration hardening and monitoring for unusual logging activity can also help mitigate risks associated with this vulnerability.
For a comprehensive assessment of application security, organizations may consider engaging in application security assessments to identify similar weaknesses.
Detection Guidance
Monitoring should focus on log entries that may contain sensitive information, particularly around RPC request handling. Additionally, organizations should look for behavioral anomalies, such as repeated invalid signature logs.
AppSecure Threat Intelligence Insight
The significance of this vulnerability lies in its potential to compromise the confidentiality of sensitive information within distributed systems. Organizations should consider establishing a robust vulnerability management program to effectively address such risks and improve their overall security posture.
Additionally, organizations should stay informed about emerging vulnerabilities and trends in the security landscape through regular reviews and assessments. Engaging in proactive measures such as penetration testing can further enhance defenses against potential attacks.
Ultimately, a comprehensive approach to security, including timely patching, monitoring, and proactive assessments, is essential for mitigating risks associated with vulnerabilities such as CVE-2026-22782.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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