{"id":"EUVD-2026-29191","revision":null,"records":[{"revision":"cfa6a60b497040e7854f3d4bf69c092b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-42876","aliases":[],"title":"External Secrets Operator: Privilege escalation with secret overwriting","description":"External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.1, a user who only has permission to create ExternalSecret resources can cause the operator to create a Secret that Kubernetes will automatically populate with a long-lived token for the specified service account. This effectively allows the user to impersonate any service account in the namespace without needing direct create permissions on TokenRequest or Secrets of that type. This vulnerability is fixed in 2.4.1.","state":0,"publishedAt":"2026-05-11T18:58:44.069+00:00","modifiedAt":"2026-10-06T15:30:23.871+00:00","affected":[{"ecosystem":"Vendor product","name":"external-secrets","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"external-secrets\",\n                    \"product\": \"external-secrets\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.4.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","score":4.9,"severity":"MEDIUM"}],"references":["https://github.com/external-secrets/external-secrets/security/advisories/GHSA-fq7h-9x26-6j22","https://github.com/external-secrets/external-secrets/commit/4ddd240af7fe88725d9857b9a0c198073502e288","https://github.com/external-secrets/external-secrets/releases/tag/v2.4.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-42876","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-42876","identifiers":["CVE-2026-42876"]},"retained":false,"historicalAffected":[]},{"revision":"30ec2d779517460386594b2e3b1ea697","observedAt":"2026-11-11T11:06:58.579+00:00","statement":{"source":"euvd","id":"EUVD-2026-29191","aliases":["CVE-2026-42876","GHSA-fq7h-9x26-6j22"],"title":"External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. 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This vulnerability is fixed in 2.4.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","score":4.9,"severity":null}],"references":["https://github.com/external-secrets/external-secrets/security/advisories/GHSA-fq7h-9x26-6j22","https://github.com/external-secrets/external-secrets/commit/4ddd240af7fe88725d9857b9a0c198073502e288","https://github.com/external-secrets/external-secrets/releases/tag/v2.4.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-29191","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 11, 2026, 6:58:44 PM","dateUpdated":"Oct 6, 2026, 3:30:23 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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This vulnerability is fixed in 2.4.1.","state":0,"publishedAt":"2026-05-11T20:25:44.307+00:00","modifiedAt":"2026-06-17T10:48:32.953+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","score":4.9,"severity":"MEDIUM"}],"references":["https://github.com/external-secrets/external-secrets/commit/4ddd240af7fe88725d9857b9a0c198073502e288","https://github.com/external-secrets/external-secrets/releases/tag/v2.4.1","https://github.com/external-secrets/external-secrets/security/advisories/GHSA-fq7h-9x26-6j22"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-42876","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-285"],"productCriteria":[],"sourceDates":{"published":"2026-05-11T20:25:44.307","lastModified":"2026-06-17T10:48:32.953"},"relatedAdvisories":[],"note":"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."},"key":"nvd:CVE-2026-42876","identifiers":["CVE-2026-42876"]},"retained":false,"historicalAffected":[]},{"revision":"3d80733710e24f6ab85397ea11e1cb87","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-fq7h-9x26-6j22","aliases":["CVE-2026-42876","GO-2026-5377"],"title":"ExternalSecrets vulnerable to privilege escalation with secret overwriting","description":"ExternalSecrets allows users to craft Service Account tokens for misconfigured Service Accounts in namespaces the users have access to.\n\n### Impact\n\nA user who only has permission to create ExternalSecret resources can cause the operator to create a Secret that Kubernetes will automatically populate with a long-lived token for the sepcified service account. This effectively allows the user to impersonate any service account in the namespace without needing direct create permissions on TokenRequest or Secrets of that type.\n\nThe problem is mitigated in severity by the fact that the user must have pre-existing permissions already at almost the same level as the escalation later gives. The attacker cannot use this method to gain access to more information without other things also being misconfigured in the ESO installation.\n\n### Patches\n\nDisallow this combination including the bootstrap token secret type.\n\n### Workarounds\n\n* Add admission control logic to prevent the use of Templates targeting undesired Types\n* Remove Service Account Token generation via kube-controller-manager flags\n* Restrict User RBAC on production clusters and sensitive namespaces","state":0,"publishedAt":"2026-05-08T17:24:15+00:00","modifiedAt":"2026-09-10T03:50:46.7517021+00:00","affected":[{"ecosystem":"Go","name":"github.com/external-secrets/external-secrets/apis","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.1.0"},{"kind":"fixed","version":"2.4.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/external-secrets/external-secrets/security/advisories/GHSA-fq7h-9x26-6j22","https://nvd.nist.gov/vuln/detail/CVE-2026-42876","https://github.com/external-secrets/external-secrets/commit/4ddd240af7fe88725d9857b9a0c198073502e288","https://github.com/external-secrets/external-secrets","https://github.com/external-secrets/external-secrets/releases/tag/v2.4.1"],"sourceUrl":"https://github.com/advisories/GHSA-fq7h-9x26-6j22","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-fq7h-9x26-6j22","identifiers":["GHSA-fq7h-9x26-6j22","CVE-2026-42876","GO-2026-5377"]},"retained":false,"historicalAffected":[]},{"revision":"44be8c9296224118a9e9c84280010d22","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5377","aliases":["CVE-2026-42876","GHSA-fq7h-9x26-6j22"],"title":"ExternalSecrets vulnerable to privilege escalation with secret overwriting in github.com/external-secrets/external-secrets/apis","description":"ExternalSecrets vulnerable to privilege escalation with secret overwriting in github.com/external-secrets/external-secrets/apis.\n\nNOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.\n\n(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)\n\nThe additional affected modules and versions are: github.com/external-secrets/external-secrets/apis from v0.1.0 before v2.4.1.","state":0,"publishedAt":"2026-06-25T18:43:19+00:00","modifiedAt":"2026-06-25T19:45:36.8282638+00:00","affected":[{"ecosystem":"Go","name":"github.com/external-secrets/external-secrets/apis","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/external-secrets/external-secrets/security/advisories/GHSA-fq7h-9x26-6j22","https://nvd.nist.gov/vuln/detail/CVE-2026-42876","https://github.com/external-secrets/external-secrets/commit/4ddd240af7fe88725d9857b9a0c198073502e288","https://github.com/external-secrets/external-secrets/releases/tag/v2.4.1"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5377","license":"OSV · upstream source license applies","key":"osv:GO-2026-5377","identifiers":["GO-2026-5377","CVE-2026-42876","GHSA-fq7h-9x26-6j22"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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