CVE-2026-59563

4.6 mediumEPSS 0.1%

Medium (4.6). EPSS 0.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

4.6 medium

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

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-31)
CWE: CWE-305
Published: 2026-09-28
Modified: 2026-09-28
Record from: the NVD, synced 2026-10-19

References

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

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