External Secrets Operator: Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore
Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.
cve-program · CVE-2026-42875
PublishedExternal Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.0, Namespaced SecretStore resources that used CAProvider with type ConfigMap could resolve CA material from another namespace when caProvider.namespace was set. This bypassed the namespace boundary enforced for SecretStore-backed references in providers that rely on the shared runtime CA resolver. This vulnerability is fixed in 2.4.0.
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cve-program · CVE-2026-42875
PublishedExternal Secrets Operator: Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore
External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.0, Namespaced SecretStore resources that used CAProvider with type ConfigMap could resolve CA material from another namespace when caProvider.namespace was set. This bypassed the namespace boundary enforced for SecretStore-backed references in providers that rely on the shared runtime CA resolver. This vulnerability is fixed in 2.4.0.
- Source published
- 11 May 2026 18:56:34 UTC
- Source modified
- 12 May 2026 16:25:13 UTC
- Saved here
- 23 Oct 2026 15:48:27 UTC
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CVSS 4.0 · 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N