CVE-2026-59563
MediumCVSS 4.6Summary
Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2.
Risk Assessment
Token replay may allow an attacker to perform unauthorized operations on other resources of the same type, potentially leading to data integrity violations or unauthorized changes. The risk is moderate but requires attention in environments with multiple resources.
Recommendation
Update Zscaler MCP Server to version 0.7.2, which fixes this vulnerability. Also verify that HMAC tokens are properly bound to target resources.
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Original NVD description (English source)
Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

