CVE-2026-59563

Published: Sep 28, 2026Modified: Sep 28, 2026

4.6

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

Exploitability: 2.1 / Impact: 2.5

Source: cve@zscaler.com (Secondary)

Description

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.

Related CWEs

CWE-305

Authentication Bypass by Primary Weakness

The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

References (1)

https://github.com/zscaler/zscaler-mcp-server/pull/41

Source: cve@zscaler.com

Timeline

No history available yet.