{"id":"CVE-2026-49823","summary":"Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook","details":"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, a Fission Function spec carries three reference types — Secret, ConfigMap, and Package. The first two were namespace-validated by the admission webhook; PackageRef.Namespace was not. This issue has been patched in version 1.24.0.","aliases":["GHSA-3r8v-2xmj-5c39","GO-2026-5846"],"modified":"2026-07-31T18:31:30.496787271Z","published":"2026-06-10T17:23:23.682Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-284","CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49823.json"},"references":[{"type":"WEB","url":"https://github.com/fission/fission/releases/tag/v1.24.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49823.json"},{"type":"ADVISORY","url":"https://github.com/fission/fission/security/advisories/GHSA-3r8v-2xmj-5c39"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49823"},{"type":"FIX","url":"https://github.com/fission/fission/pull/3389"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/fission/fission","events":[{"introduced":"0"},{"fixed":"ce617120c41b9e4a51d577f81b441238264e88fd"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.24.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.23.0-rc1","v1.23.0","v1.22.0","v1.22.0-rc2","v1.22.0-rc1","v1.21.0","v1.21.0-rc2","v1.21.0-rc1","v1.20.5","v1.20.4","v1.20.3","v1.20.2","v1.20.1","v1.20.0","v1.20.0-rc2","v1.20.0-rc1","v1.19.0","v1.19.0-rc2","v1.19.0-rc1","v1.18.0","v1.18.0-rc2","v1.18.0-rc1","v1.17.0","v1.17.0-rc2","v1.16.0","v1.17.0-rc1","v1.16.0-rc2","v1.16.0-rc1","v1.15.1","v1.15.0","v1.15.0-rc2","v1.15.0-rc1","v1.14.1","1.14.1","v1.14.0","1.14.0","v1.13.1","1.13.1","v1.13.0","1.13.0","v1.8.0","1.8.0","v1.7.1","1.7.1","v1.7.0","1.7.0","v1.7.0-rc.2","1.7.0-rc.2","v1.7.0-rc.1","1.7.0-rc.1","v1.6.0","1.6.0","1.3.0","1.0-rc1","0.10.0","0.7.2","0.6.1","latest","0.6.0","0.4.1","0.4.0","0.4.0rc","0.3.0","0.3.0-rc","v0.2.1","v0.2.0-20170901","nightly20170705","nightly20170621","alpha20170124","kubecon"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49823.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"}]}