OCTOBER 10, 2026
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Case File

CVE-2026-16652

HIGH · CVSS 7.1 EPSS 0.27% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-21 · Last synced 2026-10-10

CyberRota Analysis

AI-Generated

The vulnerability allows authenticated users with namespace write permissions to create or update a Schedule that leads to excessive CPU consumption in the Temporal Server's Frontend and Schedule worker components. This can result in a denial of service, as the server may continuously evaluate excluded candidates without a work budget, impacting system availability. Organizations using Temporal Server should prioritize addressing this issue to prevent potential service disruptions.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-16652
Severity
HIGH
CVSS
7.1
EPSS
0.27%

Original NVD Description

Temporal Server did not bound the work performed while searching for a Schedule's next action time. An authenticated caller with namespace write permission could create or update a Schedule that combines a fine-grained cadence with an exclusion calendar that rejects every candidate time, causing the server to evaluate excluded candidates without a per-search work budget. This can consume excessive CPU in Frontend and Schedule worker components. A persisted specification can also cause its backing Schedule Workflow to repeatedly fail and retry, allowing CPU consumption to continue without additional requests until the Schedule is deleted or its backing Workflow is terminated. Repeated or parallel exploitation can deny service. The issue affects availability only; it does not expose or modify Workflow data.