Temporal Server: attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster

A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow IDs and, for signal operations, signal names. This was due to a bu...

GHSA-XPG8-3HHP-P7W8 Temporal Server: attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster

A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow IDs and, for signal operations, signal names. This was due to a bu...

CVE-2026-5199 Cross Namespace Access via Batch Operation

A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow IDs and, for signal operations, signal names. This was due to a bu...

CVE-2026-5199 Cross Namespace Access via Batch Operation

A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow IDs and, for signal operations, signal names. This was due to a bu...

CVE-2026-5199

A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow IDs and, for signal operations, signal names. This was due to a bu...

CVE-2026-5199

The CVE-2026-5199 issue arises from a bug in Temporal Server v1.29.0 where a writer in an attacker-controlled namespace could signal, delete, or reset workflows/activities in a victim namespace on the same cluster. The root cause is that the batch activity validated the victim namespace ID but di...

CVE-2026-5199 Cross Namespace Access via Batch Operation

A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow IDs and, for signal operations, signal names. This was due to a bu...

CLEANSTART-2026-BT99405 Security fixes for CVE-2026-24051, CVE-2026-25679, CVE-2026-26958, CVE-2026-27139, CVE-2026-27142 applied in versions: 1.29.2-r0, 1.29.2-r1

Multiple security vulnerabilities affect the temporal-server-fips package. These issues are resolved in later releases. See references for individual vulnerability details...

CVE-2026-5199: Authorization Bypass Through User-Controlled Key

A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow IDs and, for signal operations, signal names. This was due to a bu...

PT-2026-29583

Name of the Vulnerable Software and Affected Versions Temporal Server versions 1.29.0 and later Description A user with a writer role in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the...

Temporal Server 安全漏洞

Temporal Server is a microservices orchestration platform developed by Temporal Corporation. There is a security vulnerability in Temporal Server. This vulnerability stems from the fact that users with the “Writer” role in the namespaces controlled by attackers can send signals, delete, and reset...

GHSA-9H8M-3FM2-QJRQ vulnerabilities

Vulnerabilities for packages: terraform-provider-grafana-fips, metrics-server-fips, conftest-fips, k8s-agents-operator-fips, cloudprober, packer, cloudflared-fips, docker-cli-buildx, k8sgpt, grafana-pyroscope, gcp-compute-persistent-disk-csi-driver-fips, metrics-server, spicedb-operator,...

GHSA-FW7P-63QQ-7HPR vulnerabilities

Vulnerabilities for packages: sops, prometheus-mysqld-exporter, sops-fips, keda, db-operator, wolfictl, prometheus-mysqld-exporter-fips, apko, gitsign, step-ca-fips, croc, trillian, ratify-fips, step-ca, caddy, tkn-fips, age, step, spire-server-fips, spire-server, age-fips, mariadb-operator,...

SUSE CVE-2025-14987

When system.enableCrossNamespaceCommands is enabled on by default, the Temporal server permits certain workflow task commands e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, RequestCancelExternalWorkflowExecution to target a different namespace than the namespace authorized at...

GO-2026-4273 Temporal has an Incorrect Authorization vulnerability in go.temporal.io/server

Temporal has an Incorrect Authorization vulnerability in go.temporal.io/server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from vulnerability scanners, plea...

CVE-2024-2689

Denial of Service in Temporal Server prior to version 1.20.5, 1.21.6, and 1.22.7 allows an authenticated user who has permissions to interact with workflows and has crafted an invalid UTF-8 string for submission to potentially cause a crashloop. If left unchecked, the task containing the invalid...

CVE-2025-14987

When system.enableCrossNamespaceCommands is enabled on by default, the Temporal server permits certain workflow task commands e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, RequestCancelExternalWorkflowExecution to target a different namespace than the namespace authorized at...

GHSA-HMHP-GH8M-C8XP Temporal has an Incorrect Authorization vulnerability

When system.enableCrossNamespaceCommands is enabled on by default, the Temporal server permits certain workflow task commands e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, RequestCancelExternalWorkflowExecution to target a different namespace than the namespace authorized at...

EUVD-2025-205855

When system.enableCrossNamespaceCommands is enabled on by default, the Temporal server permits certain workflow task commands e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, RequestCancelExternalWorkflowExecution to target a different namespace than the namespace authorized at...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the system.enableCrossNamespaceCommands when it is enabled on by default. An attacker can perform unauthorized actions in a different namespace by submitting workflow task commands that target namespaces othe...