CVE-2026-70442 in Google Chat Notification Plugin
Summary
by MITRE • 08/05/2026
Jenkins Google Chat Notification Plugin 166.ve6b_de280f2e8 and earlier does not set the appropriate context for credentials lookup, allowing attackers with Item/Configure permission to access and capture credentials they are not entitled to use.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/05/2026
The Jenkins Google Chat Notification Plugin vulnerability represents a critical authorization bypass issue that stems from improper credential context handling within the plugin's configuration system. This flaw affects versions 166.ve6b_de280f2e8 and earlier, where the plugin fails to properly validate the security context when performing credential lookups. The vulnerability is classified under CWE-285, which addresses improper authorization in software systems, specifically manifesting as insufficient access control during credential retrieval operations.
The technical implementation flaw occurs when the plugin processes configuration data containing credentials for Google Chat notifications. Rather than enforcing proper access controls based on the user's permissions and the specific context of the configuration being accessed, the plugin operates with a relaxed security posture that allows arbitrary credential retrieval. This design defect enables attackers who possess Item/Configure permission to exploit the vulnerability and extract sensitive authentication information from other parts of the Jenkins system.
Operational impact of this vulnerability extends beyond simple credential theft, as it provides attackers with potential access to multiple systems and services that rely on the stolen credentials. The attack vector requires minimal privileges since Item/Configure permissions are often granted more broadly within Jenkins environments compared to higher-level administrative rights. Once exploited, adversaries can gain access to Google Chat integration tokens, API keys, or other authentication materials that may provide access to additional network resources or cloud services.
From an ATT&CK framework perspective, this vulnerability maps to T1566.002 (Phishing for Information) and T1528 (Gather Victim Identity and Info), as it enables unauthorized credential harvesting through legitimate plugin configuration mechanisms. The attack chain typically involves an attacker with limited Jenkins permissions accessing the plugin configuration interface, identifying credential fields, and extracting authentication data that should normally be restricted to authorized users only.
Mitigation strategies include upgrading to Jenkins Google Chat Notification Plugin version 167.v04987d5a_3238 or later, which implements proper context validation for credential lookups. Organizations should also enforce the principle of least privilege by restricting Item/Configure permissions to only trusted users and groups. Additional protective measures include implementing role-based access control policies, monitoring configuration changes through Jenkins audit logging, and conducting regular security assessments of plugin installations. Network segmentation and credential rotation procedures should be implemented to minimize potential damage from successful exploitation attempts.