# Temporal Technologies Temporal Server vulnerabilities Source: https://junglewise.ai/threats/technologies/temporal-server Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/temporal-server.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 9 vulnerabilities in Temporal Technologies Temporal Server: 1 in the last 7 days and 7 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-87857, was published on 9 November 2026. 3 vulnerabilities in the last four weeks, level on the four before (3). ## Counts - Last 7 days: 1 - Last 30 days: 2 - Last 90 days: 7 - All time: 9 (0 critical, 0 exploited in the wild) ## About Temporal Technologies Temporal Server Temporal Server is an open-source orchestration engine used to manage and execute reliable, stateful workflows. ## Latest Temporal Technologies Temporal Server vulnerabilities - [CVE-2026-87857: Temporal Server workflow-history pagination token namespace bypass](https://junglewise.ai/threats/cve-2026-87857-temporal-server-does-not-bind-a-workflow-history-pagination-token) (info, published 9 Nov 2026) - [CVE-2026-120091: Temporal Server arbitrary command execution via Kubernetes worker configuration](https://junglewise.ai/threats/cve-2026-120091-temporal-server-compiles-a-worker-controller-instance-module-go) (info, published 2 Nov 2026) - [CVE-2026-89140: Temporal Server namespace bypass in internal completion callbacks](https://junglewise.ai/threats/cve-2026-89140-temporal-server-does-not-bind-internal-completion-callbacks-to) (info, published 12 Oct 2026) - [CVE-2026-104355: Temporal Server local namespace modification via replication](https://junglewise.ai/threats/cve-2026-104355-a-connected-peer-cluster-can-modify-a-temporal-server-cluster-s) (info, published 12 Oct 2026) - [CVE-2026-89139: Temporal Server arbitrary command execution via subprocess compute provider](https://junglewise.ai/threats/cve-2026-89139-temporal-server-compiles-a-worker-controller-instance-module-into) (info, published 21 Sep 2026) - [CVE-2026-16652: Temporal Server CPU exhaustion in Schedule search](https://junglewise.ai/threats/cve-2026-16652-temporal-server-did-not-bound-the-work-performed-while-searching) (info, published 21 Sep 2026) - [CVE-2026-16651: temporalio/sqlparser panic in MySQL version comment parsing](https://junglewise.ai/threats/cve-2026-16651-temporalio-sqlparser-can-panic-when-parse-parsestrictddl-or) (info, published 21 Sep 2026) - [CVE-2026-5724: Temporal Server missing authentication in gRPC streaming interceptor](https://junglewise.ai/threats/cve-2026-5724-temporal-server-missing-authentication-in-grpc-streaming) (medium, CVSS 4, published 10 Apr 2026) - [CVE-2026-5199: Temporal Server authorization bypass in batch workflow operations](https://junglewise.ai/threats/cve-2026-5199-temporal-server-authorization-bypass-in-batch-workflow-operations) (medium, CVSS 4, published 1 Apr 2026) ## Most severe Temporal Technologies Temporal Server vulnerabilities - [CVE-2026-5724: Temporal Server missing authentication in gRPC streaming interceptor](https://junglewise.ai/threats/cve-2026-5724-temporal-server-missing-authentication-in-grpc-streaming) (medium, CVSS 4, published 10 Apr 2026) - [CVE-2026-5199: Temporal Server authorization bypass in batch workflow operations](https://junglewise.ai/threats/cve-2026-5199-temporal-server-authorization-bypass-in-batch-workflow-operations) (medium, CVSS 4, published 1 Apr 2026) - [CVE-2026-89139: Temporal Server arbitrary command execution via subprocess compute provider](https://junglewise.ai/threats/cve-2026-89139-temporal-server-compiles-a-worker-controller-instance-module-into) (info, published 21 Sep 2026) - [CVE-2026-16651: temporalio/sqlparser panic in MySQL version comment parsing](https://junglewise.ai/threats/cve-2026-16651-temporalio-sqlparser-can-panic-when-parse-parsestrictddl-or) (info, published 21 Sep 2026) - [CVE-2026-104355: Temporal Server local namespace modification via replication](https://junglewise.ai/threats/cve-2026-104355-a-connected-peer-cluster-can-modify-a-temporal-server-cluster-s) (info, published 12 Oct 2026) - [CVE-2026-89140: Temporal Server namespace bypass in internal completion callbacks](https://junglewise.ai/threats/cve-2026-89140-temporal-server-does-not-bind-internal-completion-callbacks-to) (info, published 12 Oct 2026) - [CVE-2026-16652: Temporal Server CPU exhaustion in Schedule search](https://junglewise.ai/threats/cve-2026-16652-temporal-server-did-not-bound-the-work-performed-while-searching) (info, published 21 Sep 2026) - [CVE-2026-87857: Temporal Server workflow-history pagination token namespace bypass](https://junglewise.ai/threats/cve-2026-87857-temporal-server-does-not-bind-a-workflow-history-pagination-token) (info, published 9 Nov 2026) - [CVE-2026-120091: Temporal Server arbitrary command execution via Kubernetes worker configuration](https://junglewise.ai/threats/cve-2026-120091-temporal-server-compiles-a-worker-controller-instance-module-go) (info, published 2 Nov 2026) ## Vulnerabilities per week 3 vulnerabilities in the last four weeks, level on the four before (3). | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 3 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 2 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 1 | 0 | 0 | | 9 Nov 2026 | 1 | 0 | 0 | ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Temporal Technologies Temporal Server vulnerabilities", https://junglewise.ai/threats/technologies/temporal-server, 12 November 2026.