{"id":"CVE-2026-46618","aliases":["GHSA-7pjr-qpvh-m339","GO-2026-5230"],"url":"https://o3.security/vulnerability/CVE-2026-46618","summary":"Fission builder accepts arbitrary buildcmd strings from Environment.spec.builder.command,   allowing the builder pod to invoke arbitrary executables","details":"Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.23.0, before the round-1 security sweep, pkg/builder/builder.go passed Environment.spec.builder.command directly into exec.Command(...) after a strings.Fields split, with no validation of the executable path or its arguments. A user who could create or update Environment CRDs in a namespace observed by the buildermgr could thereby point the builder pod at any executable inside the builder image (e.g. /bin/sh -c '...') and execute arbitrary code in the builder pod context. This issue has been patched in version 1.23.0.","published":"2026-06-10T17:20:53.216Z","modified":"2026-08-12T03:51:08.161236575Z","cvss":null,"epss":{"score":0.00364,"percentile":0.295,"asOf":"2026-08-18"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/fission/fission","fixedVersion":"1.23.0"}],"fix":{"url":"https://github.com/fission/fission/pull/3364","label":"fission/fission#3364"},"references":[{"type":"WEB","url":"https://github.com/fission/fission/releases/tag/v1.23.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46618.json"},{"type":"ADVISORY","url":"https://github.com/fission/fission/security/advisories/GHSA-7pjr-qpvh-m339"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46618"},{"type":"FIX","url":"https://github.com/fission/fission/pull/3364"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:08.161236575Z"}}