{"id":"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.","aliases":["GHSA-4g9c-3x4p-mfpp"],"modified":"2026-07-15T01:49:02.219373354Z","published":"2026-04-28T13:42:35.525Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40968.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.0.0"},{"fixed":"1.0.3"}]}],"cna_assigner":"vmware","cwe_ids":["CWE-653"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/spring-projects/spring-grpc","events":[{"introduced":"0"},{"fixed":"650e78f5eeeb8c0c366f0e65b65001c35e97014d"}],"database_specific":{"cpe":"cpe:2.3:a:vmware:spring_grpc:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.0.3"}],"source":"CPE_RANGE"}}],"versions":["v1.0.2","v1.0.1","v1.0.0","v1.0.0-RC1","v0.11.0","v0.10.0","v0.9.0","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40968.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}