{"id":"CVE-2026-49823","aliases":["GHSA-3r8v-2xmj-5c39","GO-2026-5846"],"url":"https://o3.security/vulnerability/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.","published":"2026-06-10T17:23:23.682Z","modified":"2026-08-07T11:51:14.352252181Z","cvss":{"score":7.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/fission/fission","fixedVersion":"1.24.0"}],"fix":{"url":"https://github.com/fission/fission/pull/3389","label":"fission/fission#3389"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:14.352252181Z"}}