{"id":"CVE-2026-40968","aliases":["EUVD-2026-26054","GHSA-4g9c-3x4p-mfpp"],"status":"published","title":"Spring gRPC SecurityContext leaks across requests on authorization failure","description":"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.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00171,"percentile":0.06624,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-653"],"published":"2026-04-28T13:42:35Z","modified":"2026-10-28T02:30:49Z","fixes":[{"ecosystem":"Maven","package":"org.springframework.grpc:spring-grpc","fixed_in":["1.0.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.springframework.grpc:spring-grpc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.springframework.grpc:spring-grpc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3"}]}],"versions":["0.1.0","0.10.0","0.11.0","0.12.0","0.2.0","0.3.0","0.4.0","0.5.0","0.6.0","0.7.0","0.8.0","0.9.0","1.0.0","1.0.0-RC1","1.0.1","1.0.2"]}],"products":[{"vendor":"spring","product":"spring grpc"},{"vendor":"vmware","product":"spring_grpc"}],"references":[{"url":"https://spring.io/security/cve-2026-40968","tags":["Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40968","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4g9c-3x4p-mfpp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40968.json","tags":["advisory"]},{"url":"https://github.com/spring-projects/spring-grpc","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-40968","title":"Spring gRPC SecurityContext leaks across requests on authorization failure","description":"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.","status":"published","published":"2026-04-28T13:42:35.525Z","modified":"2026-04-28T14:36:35.953Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-653"],"updated_at":"2026-11-02T13:43:11.445168Z"}],"euvd":[{"id":"EUVD-2026-26054","description":"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.","status":"published","published":"2026-04-28T13:42:35Z","modified":"2026-04-28T14:36:35Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:24:16.393887Z"}],"ghsa":[{"id":"GHSA-4g9c-3x4p-mfpp","title":"Spring gRPC SecurityContext leaks across requests upon authorization failure","description":"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.","status":"published","published":"2026-04-28T15:30:51Z","modified":"2026-05-06T19:59:38Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-653"],"updated_at":"2026-11-02T14:40:02.883746Z"}],"nvd":[{"id":"CVE-2026-40968","description":"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.","status":"published","published":"2026-04-28T15:16:30.4Z","modified":"2026-10-26T20:10:00.16Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-653"],"updated_at":"2026-11-02T14:12:16.252509Z"}],"osv":[{"id":"CVE-2026-40968","title":"Spring gRPC SecurityContext leaks across requests on authorization failure","description":"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.","status":"published","published":"2026-04-28T13:42:35.525Z","modified":"2026-10-28T02:30:49.423152518Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-653"],"updated_at":"2026-11-02T15:45:03.424067Z"},{"id":"GHSA-4g9c-3x4p-mfpp","title":"Spring gRPC SecurityContext leaks across requests upon authorization failure","description":"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.","status":"published","published":"2026-04-28T15:30:51Z","modified":"2026-05-06T20:26:26.506854Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-653"],"updated_at":"2026-11-02T15:46:37.148947Z"}]}}