CVE-2025-14986
📋 TL;DR
This vulnerability allows users authorized for one Temporal namespace to bypass that namespace's validation rules and feature gates by specifying a different namespace in embedded workflow start requests. It affects Temporal servers running versions 1.24.0 through 1.29.1 with the frontend.enableExecuteMultiOperation feature enabled.
💻 Affected Systems
- Temporal
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Authorized users could bypass critical namespace-specific policies like rate limits, resource quotas, or security controls, potentially causing resource exhaustion or policy violations.
Likely Case
Users could circumvent namespace-specific validation rules, allowing workflows that should be blocked by namespace policies to execute.
If Mitigated
With proper namespace isolation and monitoring, impact is limited to policy bypass rather than data access or privilege escalation.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of the ExecuteMultiOperation API.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.27.4, 1.28.2, or 1.29.2
Vendor Advisory: https://github.com/temporalio/temporal/releases
Restart Required: Yes
Instructions:
1. Identify your Temporal server version. 2. Upgrade to 1.27.4, 1.28.2, or 1.29.2 depending on your current version. 3. Restart Temporal services. 4. Verify the fix by testing ExecuteMultiOperation requests.
🔧 Temporary Workarounds
Disable ExecuteMultiOperation feature
allDisable the vulnerable feature flag to prevent exploitation
Set frontend.enableExecuteMultiOperation: false in Temporal configuration
🧯 If You Can't Patch
- Implement strict namespace access controls and monitoring for policy violations
- Audit all ExecuteMultiOperation API usage for namespace mismatches
🔍 How to Verify
Check if Vulnerable:
Check if running Temporal 1.24.0-1.29.1 and frontend.enableExecuteMultiOperation is enabled in configurationCheck Version:
temporal-server --version or check server logs for version informationVerify Fix Applied:
Verify version is 1.27.4, 1.28.2, or 1.29.2 and test ExecuteMultiOperation with namespace mismatch📡 Detection & Monitoring
Log Indicators:
- ExecuteMultiOperation requests with namespace field mismatches between outer and embedded requests
- Workflow executions bypassing namespace validation rules
Network Indicators:
- API calls to ExecuteMultiOperation endpoint with suspicious namespace parameters
SIEM Query:
source="temporal" AND "ExecuteMultiOperation" AND namespace_mismatch