{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-49824: Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-49824","status":"final","version":"1","initial_release_date":"2026-06-10T17:25:51.920Z","current_release_date":"2026-06-10T18:21:55.488Z","revision_history":[{"date":"2026-06-10T17:25:51.920Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, the Fission Function admission webhook (pkg/webhook/function.go) validated that spec.secrets[].namespace and spec.configmaps[].namespace equalled the function's own namespace but performed no equivalent check on spec.environment.namespace. This issue has been patched in version 1.24.0.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-49824 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-49824"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-49824"},{"category":"external","summary":"https://github.com/fission/fission/security/advisories/GHSA-cvw6-gfvv-953q","url":"https://github.com/fission/fission/security/advisories/GHSA-cvw6-gfvv-953q"},{"category":"external","summary":"https://github.com/fission/fission/pull/3389","url":"https://github.com/fission/fission/pull/3389"},{"category":"external","summary":"https://github.com/fission/fission/releases/tag/v1.24.0","url":"https://github.com/fission/fission/releases/tag/v1.24.0"}]},"product_tree":{"branches":[{"category":"vendor","name":"fission","branches":[{"category":"product_name","name":"fission","branches":[{"category":"product_version","name":"< 1.24.0","product":{"name":"fission fission < 1.24.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:fission:fission:\\<_1.24.0:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-49824","title":"Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook","notes":[{"category":"description","text":"Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, the Fission Function admission webhook (pkg/webhook/function.go) validated that spec.secrets[].namespace and spec.configmaps[].namespace equalled the function's own namespace but performed no equivalent check on spec.environment.namespace. This issue has been patched in version 1.24.0.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","baseScore":8.5,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}