PT-2026-37287 · Unknown · External Secrets Operator

Moolen · Published 2026-05-05 · Updated 2026-05-11 · CVE-2026-42875

Positive Technologies (AI Summary)

CVSS v4.0

5.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions External Secrets Operator versions prior to 2.4.0

Description Namespaced SecretStore resources using CAProvider with type ConfigMap could resolve CA material from a different namespace when the caProvider.namespace variable was set. This behavior bypassed the namespace boundary enforced for SecretStore-backed references in providers relying on the shared runtime CA resolver. While the accessible data is used for CA validation and not directly exposed, this leads to a trust-boundary violation where a tenant can force its SecretStore to consume CA material owned by another namespace. Additionally, it allows for existence disclosure, enabling an attacker to infer if a specific target ConfigMap or key exists in another namespace.

Recommendations Update to version 2.4.0.

Fix

Improper Authorization

Exposure of Resource to Wrong Sphere

Weakness Enumeration

CWE-285

CWE-668

Related Identifiers

CVE-2026-42875

GHSA-WV26-88M5-6H59

Affected Products

External Secrets Operator

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-42875 · Security Note
• https://osv.dev/vulnerability/GHSA-wv26-88m5-6h59 · Vendor Advisory
• https://github.com/external-secrets/external-secrets/security/advisories/GHSA-wv26-88m5-6h59 · Note
• https://github.com/external-secrets/external-secrets · Note