{"id":"CVE-2026-40968","aliases":["GHSA-4g9c-3x4p-mfpp"],"url":"https://o3.security/vulnerability/CVE-2026-40968","summary":"Spring gRPC SecurityContext leaks across requests on authorization failure","details":"When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can be inherited by a subsequent unauthenticated request on the same thread. This may allow the subsequent user to gain escalated permissions.\n\nAffected versions:\nSpring gRPC: 1.0.0 - 1.0.2 (fixed in 1.0.3). Older, unsupported versions are also affected.","published":"2026-04-28T13:42:35.525Z","modified":"2026-08-12T03:51:10.187098916Z","cvss":{"score":4.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":{"score":0.00171,"percentile":0.06862,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework.grpc:spring-grpc","fixedVersion":"1.0.3"}],"fix":null,"references":[{"type":"WEB","url":"https://spring.io/security/cve-2026-40968"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40968.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40968"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:10.187098916Z"}}