CVE-2026-16652: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-pv35-7w89-v65c
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CWE-606
Published
Advisory Summary

CVE-2026-16652 is a HIGH security vulnerability vulnerability (CWE-606: Unchecked Input for Loop Condition) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-16652 at a Glance

CVE Identifier CVE-2026-16652
GHSA Identifier GHSA-pv35-7w89-v65c
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-606: Unchecked Input for Loop Condition
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-16652

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-16652, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-606: Unchecked Input for Loop Condition, where the product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

References

NVD — CVE-2026-16652 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16652
Software Source Repository REPOSITORY
https://github.com/temporalio/temporal/pull/11014
Security Fix Commit FIX COMMIT
https://github.com/temporalio/temporal/commit/c10c730e53ae394fffaefe44ba3722150fe40720
Software Release RELEASE
https://github.com/temporalio/temporal/releases/tag/v1.30.7
Software Release RELEASE
https://github.com/temporalio/temporal/releases/tag/v1.31.3

Frequently Asked Questions

What is CVE-2026-16652?
CVE-2026-16652 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-606: Unchecked Input for Loop Condition.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-16652?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-16652?
CVE-2026-16652 is classified under CWE-606: Unchecked Input for Loop Condition (The product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping.).
How can I check Maven dependencies for CVE-2026-16652?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pv35-7w89-v65c",
  "modified" : "2026-09-21T12:32:37Z",
  "published" : "2026-09-21T12:32:37Z",
  "aliases" : [ "CVE-2026-16652" ],
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-16652"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/temporal/pull/11014"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/temporal/commit/c10c730e53ae394fffaefe44ba3722150fe40720"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/temporal/releases/tag/v1.30.7"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/temporal/releases/tag/v1.31.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-606" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-21T12:17:10Z"
  }
}