CVE-2026-42875CWE-285CWE-668

External Secrets Operator: Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore

Medium · published May 11, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
30.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
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
EPSS
0.00372 · 30.0th percentile
Weaknesses
CWE-285 · Improper Authorization; CWE-668 · Exposure of Resource to Wrong Sphere
Published
2026-05-11T18:56Z
EPSS history
Timeline
  • 11 MAY 18:56Z
    External Secrets Operator: Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore
    cvelistv5