CVE-2026-42875 (GCVE-0-2026-42875)
Vulnerability from cvelistv5
Published
2026-05-11 18:56
Modified
2026-05-12 16:25
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| external-secrets | external-secrets |
Version: < 2.4.0 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-42875",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-12T16:24:54.782478Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-12T16:25:13.165Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "external-secrets",
"vendor": "external-secrets",
"versions": [
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"descriptions": [
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"value": "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."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
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"problemTypes": [
{
"descriptions": [
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"cweId": "CWE-285",
"description": "CWE-285: Improper Authorization",
"lang": "en",
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},
{
"descriptions": [
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"cweId": "CWE-668",
"description": "CWE-668: Exposure of Resource to Wrong Sphere",
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],
"providerMetadata": {
"dateUpdated": "2026-05-11T18:56:34.097Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/external-secrets/external-secrets/security/advisories/GHSA-wv26-88m5-6h59",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/external-secrets/external-secrets/security/advisories/GHSA-wv26-88m5-6h59"
}
],
"source": {
"advisory": "GHSA-wv26-88m5-6h59",
"discovery": "UNKNOWN"
},
"title": "External Secrets Operator: Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore"
}
},
"cveMetadata": {
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"cveId": "CVE-2026-42875",
"datePublished": "2026-05-11T18:56:34.097Z",
"dateReserved": "2026-04-30T18:49:06.711Z",
"dateUpdated": "2026-05-12T16:25:13.165Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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