CVE-2026-57307: Jenkins Zowe zDevOps Plugin Credential Exposure via Missing Permission Check

Technical summary

CVE-2026-57307 results from insufficient authorization checks in the Zowe zDevOps Plugin. The vulnerability allows authenticated users holding only Overall/Read permission to bypass credential isolation controls and submit connections to attacker-controlled endpoints using pre-existing credential IDs. The attack vector is network-based with high complexity (AC:H), indicating specific conditions or knowledge is required, but the permission requirement is low (PR:L). Exploitation results in limited confidentiality and integrity impact, with no availability impact.

Business impact

Organizations using Jenkins with the Zowe zDevOps Plugin face credential exposure risk within their automation infrastructure. In multi-tenant or shared Jenkins instances, users with minimal privileges could potentially extract or exfiltrate stored credentials (API tokens, SSH keys, database passwords) to attacker-controlled systems. This undermines credential segregation policies and may violate compliance requirements around access control and secret management. Incident response and credential rotation costs could be substantial if exploitation goes undetected.

Affected systems

Jenkins Zowe zDevOps Plugin version 1.1.3.50.ve350c9b_450b_1 and all earlier versions are affected. The vulnerability affects any Jenkins instance where this plugin is installed, regardless of Jenkins version, though impact severity depends on the sensitivity of credentials stored in the plugin's scope and the privilege distribution among Jenkins users.

Exploitability

Exploitation requires the attacker to already possess Overall/Read permission in Jenkins—typically a legitimate user role. The attacker must also identify or obtain valid credential IDs, which are not openly enumerated but could be discovered through Jenkins UI inspection, plugin logs, or configuration inspection if access permits. Network accessibility to the attacker's target URL is required. While not trivial, the attack is practical in environments where read access is broadly granted or where insider threats are plausible.

Remediation

Upgrade the Zowe zDevOps Plugin to a patched version above 1.1.3.50.ve350c9b_450b_1. Pending patch availability, restrict Overall/Read permission assignment to trusted users only, implement Jenkins credential isolation using folder-level or plugin-specific role-based access control, and monitor credential usage logs for anomalous connection attempts. Audit existing Jenkins users holding read permissions and reduce scope where possible.

Patch guidance

Check the official Jenkins Zowe zDevOps Plugin releases and advisories for a patched version. Verify that the new version addresses the missing permission check in credential handling. Test patches in a non-production Jenkins environment before rollout. After patching, confirm that the plugin correctly enforces authorization checks when users attempt to submit connections using stored credentials.

Detection guidance

Monitor Jenkins logs and audit trails for: (1) connection attempts to unexpected or external URLs initiated by users with read-only roles; (2) credential access or enumeration by low-privilege users; (3) failed authorization errors related to credential operations, which may indicate exploitation attempts; (4) unusual network egress from Jenkins toward attacker-controlled infrastructure. Configure alerting on suspicious credential usage patterns, particularly when initiated by accounts not normally requiring credential access.

Why prioritize this

This vulnerability merits prompt attention because it directly undermines credential security in a central automation platform where many organizations store high-value secrets. Although the CVSS score is moderate (4.2), the practical impact of exposed Jenkins credentials—which often grant access to production systems, databases, and cloud infrastructure—is significant. Organizations with strict privilege separation policies are lower risk; those with broad read access distribution should prioritize patching. Not currently in the CISA KEV catalog, so exploitation in the wild is not yet confirmed, but the attack is feasible enough to warrant proactive remediation.

Risk score, explained

The CVSS 3.1 score of 4.2 (MEDIUM) reflects low attack complexity and low privilege requirement balanced against limited confidentiality and integrity impact and no availability impact. However, context amplifies actual risk: Jenkins credentials are high-value assets, and any breach of credential isolation is operationally serious even if the direct technical impact is confined. Organizations should treat this as higher priority than the base CVSS suggests if they store sensitive credentials and grant read access broadly.

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