CLEANSTART-2026-JP40387
Dashboard / Vulnerabilities / CLEANSTART-2026-JP40387
Summary: writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster
Details: Security vulnerability affects the temporal-server package. 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.
References: https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-JP40387.json, https://osv.dev/vulnerability/CVE-2026-5199, https://nvd.nist.gov/vuln/detail/CVE-2026-5199
Affected packages
Package
Name: temporal-server
Purl: pkg:apk/cleanstart/temporal-server
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -1.28.4-r1
Affected versions
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
