{"id":"CVE-2026-111764","revision":null,"records":[{"revision":"9415cb76e557455193d4e9778e546144","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-111764","aliases":[],"title":"A2A Java SDK has a fail-open default task authorization","description":"A2A Java SDK is the official Java SDK for the Agent2Agent (A2A) Protocol. Prior to 1.3.0.Final, the default InMemoryTaskStore configuration performs no authorization on task reads: the no-argument constructor sets authorizationProvider to null, and InMemoryTaskStore.get(String taskId) returns the stored task without checking the caller or owner. Authorization depends on supplying a TaskAuthorizationProvider and routing requests through AuthorizationRequestHandlerDecorator, whether installed through CDI or explicitly by the application. Default store wiring and manually constructed DefaultRequestHandler.builder().build() handlers, including integrations such as Spring, leave task reads unprotected when no effective authorization-provider and decorator check is installed. In a multi-caller deployment using the default configuration, a caller who knows or guesses another caller's task ID can retrieve the task status, context ID, message history, and artifacts. The default/reference transport endpoints do not enforce authentication, so the task-read disclosure is reachable by an unauthenticated caller rather than requiring a privileged account. This issue is fixed in version 1.3.0.Final.","state":0,"publishedAt":"2026-10-20T15:05:26.905+00:00","modifiedAt":"2026-10-20T16:15:50.172+00:00","affected":[{"ecosystem":"Vendor product","name":"a2a-java","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"a2aproject\",\n                    \"product\": \"a2a-java\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.3.0.Final\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/a2aproject/a2a-java/security/advisories/GHSA-qw47-mcm5-934w","https://github.com/a2aproject/a2a-java/pull/1095","https://github.com/a2aproject/a2a-java/commit/efb4e985e99390c4fc1f78c0a187a4254c0a2553","https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111764","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111764","identifiers":["CVE-2026-111764"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-08T13:04:23.5160344+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-08T13:04:23.5160344+00:00","lastSuccessAt":"2026-11-08T13:04:23.701507+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:23.7015079+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-eaa64dac63caa79c8d4905619258c41c51b39e461b996124e1a21b5e85e7e738-5e9a1b25b88c72db8d3c46be95e52009e07ae4af884484ac8e34e4d7f79f07eb","complete":true,"records":421098,"lastAttemptAt":"2026-11-08T13:04:23.0585244+00:00","lastSuccessAt":"2026-11-08T13:04:23.0353669+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:23.0585244+00:00","snapshotPublishedAt":"2026-11-08T12:20:14+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-383c643166b94ac4b6a615647191978e","complete":true,"records":13654,"lastAttemptAt":"2026-11-08T13:04:50.0771652+00:00","lastSuccessAt":"2026-11-08T13:04:50.073+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:50.073+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-08T13:04:23.5160344+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T13:04:23.5160344+00:00","lastSuccessAt":"2026-11-08T13:04:23.7022986+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:23.7022987+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-d0adb98f65b04a798dd6ab08fb972092","complete":false,"records":13666,"lastAttemptAt":"2026-11-08T13:04:49.0861553+00:00","lastSuccessAt":"2026-11-08T13:04:49.083+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:49.083+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13185,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-08T13:04:23.3678903+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:23.3678903+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-08T13:04:23.1502223+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:23.1502223+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-964c14035e6f0f6478b2870fad6a7ef9f6045876d4a12af2c2e514521e54b6af","complete":true,"records":3055,"lastAttemptAt":"2026-11-08T13:04:23.4767311+00:00","lastSuccessAt":"2026-11-08T11:07:12.1927025+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:23.4767311+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-f8647d7ba64b1ba0dfdc7130944766d5b36d5b77d18fff0c79e651a4cff3c2b9","complete":true,"records":231293,"lastAttemptAt":"2026-11-08T13:04:23.2659134+00:00","lastSuccessAt":"2026-11-08T11:06:56.2918717+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:23.2659134+00:00","snapshotPublishedAt":"2026-11-08T11:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}