EUVD-2026-29190Published

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

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cve-program · CVE-2026-42875

Published

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
Source terms: CVE Program Terms of Use

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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

euvd · EUVD-2026-29190

Published

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datePublished: May 11, 2026, 6:56:34 PM

dateUpdated: May 12, 2026, 4:25:13 PM

Source published: May 11, 2026, 6:56:34 PM (timezone not stated)
Source modified: May 12, 2026, 4:25:13 PM (timezone not stated)
Saved here: 13 Nov 2026 23:09:39 UTC
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EUVD 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

nvd · CVE-2026-42875

Published

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NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-285 · CWE-668

Original publisher date fields

published: 2026-05-11T20:25:44.143

lastModified: 2026-06-17T10:48:32.843

Source published: 11 May 2026 20:25:44 UTC
Source modified: 17 Jun 2026 10:48:32 UTC
Saved here: 25 Oct 2026 10:17:15 UTC
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CVSS 4.0 · [email protected] · Secondary · 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/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

osv · GHSA-wv26-88m5-6h59

Published

### Impact 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. The accessible data is used as CA validation material, hence it is not directly exposed. Impact: - Direct data exfiltration risk: low - Existence disclosure: an attacker can infer whether a target ConfigMap/key exists in another namespace. - Trust-boundary violation: a tenant can make its SecretStore consume CA material owned by another namespace.

Source published: 5 May 2026 18:37:12 UTC
Source modified: 10 Sep 2026 03:50:47 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V4 · 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

Publisher rating · MODERATE

osv · GO-2026-5723

Published

External Secrets Operator has Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore in github.com/external-secrets/external-secrets. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/external-secrets/external-secrets before v2.4.0.

Source published: 25 Jun 2026 22:34:38 UTC
Source modified: 25 Jun 2026 23:01:40 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

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