CVE-2026-21761 in DevOps Loop
Summary
by MITRE • 07/17/2026
HCL DevOps Loop is affected by a Cross-Origin Resource Sharing (CORS) misconfiguration. Improper CORS configuration may allow unauthorized cross-origin requests, potentially exposing application resources to untrusted domains.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/17/2026
The vulnerability in HCL DevOps Loop stems from a critical Cross-Origin Resource Sharing misconfiguration that fundamentally undermines the security boundaries of the application. This misconfiguration represents a direct violation of web security principles and creates a pathway for malicious actors to bypass origin-based access controls that are essential for protecting sensitive application resources. The flaw exists at the HTTP response level where the Access-Control-Allow-Origin header is improperly configured, allowing requests from untrusted domains to access protected resources within the DevOps environment.
This CORS misconfiguration enables a range of potential attacks including but not limited to data exfiltration, unauthorized API access, and privilege escalation within the DevOps platform. The vulnerability aligns with CWE-942 which specifically addresses "Overly Permissive Cross-Origin Resource Sharing" and represents a significant weakness in the application's security architecture. Attackers can exploit this flaw by crafting malicious web pages that make cross-origin requests to the HCL DevOps Loop instance, potentially accessing sensitive build artifacts, deployment configurations, or administrative functions without proper authentication.
The operational impact of this vulnerability extends beyond immediate data exposure to encompass broader security implications within the development and deployment pipeline. Organizations using HCL DevOps Loop may find their continuous integration and continuous delivery processes compromised, as unauthorized parties could access or manipulate build environments, credentials, or deployment scripts. The attack surface includes not only direct resource access but also potential exploitation of other vulnerabilities that might be present in the platform, creating cascading security risks within the DevOps ecosystem.
From an ATT&CK framework perspective, this vulnerability maps to T1566 - "Phishing" and T1071.001 - "Application Layer Protocol: Web Protocols" as attackers can leverage the misconfigured CORS policy to execute cross-origin requests. The threat actor could potentially use this weakness to establish persistent access to the DevOps environment, undermining the security posture of development workflows. Mitigation strategies should include implementing strict CORS policies with explicit origin whitelisting, removing wildcard configurations, and ensuring that the Access-Control-Allow-Origin header only includes trusted domains. Additionally, organizations should conduct regular security assessments of their web application configurations and implement automated monitoring to detect unauthorized cross-origin requests.
The remediation process requires careful review of all CORS configuration parameters within the HCL DevOps Loop environment, particularly examining how origin validation is implemented. Security teams must ensure that the application enforces strict access control policies and that any cross-origin requests are properly authenticated and authorized. Regular security testing including automated scanning for CORS misconfigurations should be integrated into the development lifecycle to prevent similar issues from emerging in future updates or deployments of the platform.