Argo CD, a declarative GitOps continuous delivery tool for Kubernetes, has been identified with a medium-severity vulnerability (CVE-2025-55191). This vulnerability allows for a race condition in the repository credentials handler, which can result in the Argo CD server crashing when concurrent operations are performed on the same repository URL. The affected versions of Argo CD include those between 2.1.0 and 2.14.19, 3.2.0-rc1, 3.1.0-rc1 through 3.1.7, and 3.0.0-rc1 through 3.0.18.
The vulnerability is associated with the handling of repository credentials located in the util/db/repository_secrets.go file. A valid API token with repositories resource permissions is required to trigger the race condition, which can ultimately lead to a denial-of-service state, disrupting all GitOps operations. The patch for this vulnerability is available in versions 2.14.20, 3.2.0-rc2, 3.1.8, and 3.0.19.
Given the potential impact of this vulnerability, organizations using Argo CD should prioritize patching immediately to avoid service disruptions. The urgency is underscored by the need to maintain consistent availability for GitOps operations.
As of now, there are no known exploits for this vulnerability, and it has not been classified as actively exploited. However, organizations should remain vigilant and implement the necessary updates to their systems.
Vulnerability Details
The official description of CVE-2025-55191 highlights that concurrent operations on the same repository URL can cause the Argo CD server to panic and crash. This vulnerability is classified as a race condition, which falls under CWE-362. The CVSS score for this vulnerability is 6.5, indicating a medium severity level. It is essential to understand that the vulnerability is present in multiple versions of Argo CD, specifically between 2.1.0 and 2.14.19, 3.2.0-rc1, 3.1.0-rc1 through 3.1.7, and 3.0.0-rc1 through 3.0.18.
The impact on availability is rated as high, as the server crash affects all operations, and attackers may leverage this vulnerability to create an ongoing denial-of-service state. The attack vector is network-based, with low attack complexity and low privileges required to trigger the vulnerability.
Technical Analysis
The root cause of the vulnerability stems from a race condition in the repository credentials handler. When multiple operations are executed simultaneously on the same repository URL, it leads to a state where the server cannot handle the requests adequately, resulting in a panic and subsequent crash. The attack complexity is low since it requires only a valid API token with limited permissions.
Given that the attacker does not need any user interaction and the impact is solely on availability, this vulnerability poses a significant concern for organizations relying on Argo CD for continuous delivery. The confidentiality and integrity impacts are rated as none since the vulnerability does not allow unauthorized access to sensitive information.
Risk & Impact Analysis
Risk to organizations includes potential service disruptions and prolonged downtime affecting the deployment pipeline. As organizations move towards adopting GitOps practices, the reliability of tools such as Argo CD becomes paramount. The ability for attackers to exploit this vulnerability to maintain a denial-of-service state could lead to significant operational challenges, especially in environments where continuous delivery is critical.
Organizations should assess the blast radius of this vulnerability, particularly in multi-repository setups where concurrent operations can be frequent. The urgency of addressing this vulnerability is medium, as the potential impact on availability and operational integrity is notable.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects Argo CD versions between 2.1.0 and 2.14.19, as well as 3.2.0-rc1, 3.1.0-rc1 through 3.1.7, and 3.0.0-rc1 through 3.0.18. Organizations should ensure they upgrade to fixed versions 2.14.20, 3.2.0-rc2, 3.1.8, or 3.0.19 to mitigate this risk.
Mitigation & Remediation
Organizations should prioritize patching this vulnerability by upgrading to the latest versions of Argo CD that contain fixes. The recommended versions are 2.14.20, 3.2.0-rc2, 3.1.8, and 3.0.19. If immediate patching is not feasible, consider implementing network controls to restrict access to the Argo CD server.
In addition, monitoring should be enhanced to detect unusual patterns of concurrent operations that could indicate an attempt to exploit this vulnerability. Regularly reviewing configuration and access permissions for API tokens will also help mitigate potential risks.
Penetration testing can further validate the effectiveness of applied patches and the overall security posture of the deployment.
Detection Guidance
To detect exploitation attempts, organizations should monitor logs for repeated API calls to the repository credentials handler. Behavioral anomalies such as unusual spikes in concurrent operations should also be flagged for immediate investigation.
Network signatures that correlate with known attack patterns could be useful in identifying potential exploitation attempts. Additionally, system changes that coincide with high operational demand should be monitored closely to detect any abnormal behavior.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-55191 lies in its representation of the ongoing challenges associated with race conditions in software development. This vulnerability highlights the importance of rigorous testing and validation in deployment pipelines.
As organizations increasingly adopt GitOps practices, understanding the implications of such vulnerabilities is crucial for maintaining operational integrity. Security teams should take this opportunity to reinforce their testing methodologies to prevent similar vulnerabilities in their environments.
Regular penetration testing is vital for identifying weaknesses that may lead to vulnerabilities like this in the future.
Implementing a robust vulnerability management program will also help organizations stay ahead of potential threats and ensure timely remediation.
Cloud penetration testing practices should be evaluated to ensure they adequately address the unique challenges presented by race conditions and other vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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