CVE-2026-59563CWE-305

CVE-2026-59563

Medium · published September 28, 2026

CVSS v3.1
4.6
EPSS
0%
Percentile
2.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.6 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00131 · 2.4th percentile
Weakness
CWE-305 · Authentication Bypass by Primary Weakness
Published
2026-09-28T17:17Z
References (1)
https://github.com/zscaler/zscaler-mcp-server/pull/41 · [email protected]
EPSS history
Timeline
  • 30 SEP 03:27Z
    EPSS moved — → 0%
    epss
  • 28 SEP 12:54Z
    HMAC Confirmation Token Unbinding in zscaler-mcp-server
    cvelistv5