CVE-2026-42875External Secrets Operator: Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore
Updated under an hour ago ()
Does this affect you?
It affects external-secrets. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 5.3 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-285, CWE-668
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- May 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
external-secrets external-secrets external_secrets:external_secrets (from the name) | before 2.4.0 | CNA record |
References
- https://github.com/external-secrets/external-secrets/security/advisories/GHSA-wv26-88m5-6h59x-refsource-confirm
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.