{"items":[{"id":"NVI-00013863","kind":"vulnerability","title":"Yamcs's Missing Authorization on Role and Privilege Enumeration Endpoints Allows Any Authenticated User to Disclose Full Security Configuration","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-cvw4-55pp-3hfq","CVE-2026-55547"],"plain_summary":"GitHub lists this reviewed advisory for org.yamcs:yamcs-core, org.yamcs:yamcs-core. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-05aadda0f1d524662f32b51b2b24f053"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-28T17:13:24.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-12191988e49b86afad6336bfce53fa3d"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.342%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.2789. Missing scores are unknown.","source_id":"sr-05aadda0f1d524662f32b51b2b24f053"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-12191988e49b86afad6336bfce53fa3d","url":"https://github.com/advisories/GHSA-cvw4-55pp-3hfq","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-cvw4-55pp-3hfq","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T09:56:23.004Z"},{"id":"sr-05aadda0f1d524662f32b51b2b24f053","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-55547","publisher":"FIRST EPSS","observed_at":"2026-11-04T23:33:33.049Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-12191988e49b86afad6336bfce53fa3d"],"technology":"org.yamcs:yamcs-core","known_exclusions":[],"conditions_summary":"## Summary\n\nMissing authorization checks on three IAM API endpoints (`GET /api/roles`, `GET /api/roles/{name}`, `GET /api/privileges`) allow any authenticated user — regardless of their assigned permissions — to enumerate the complete list of system privileges and role definitions. An attacker with only a low-privilege account (e.g., a read-only operator) can retrieve the full privilege taxonomy of the server, including the names and assignments of all administrator-level capabilities. This information directly enables targeted privilege escalation attacks.\n\n---\n\n## Details\n\nThree handler methods in `IamApi.java` serve sensitive security metadata without performing any authorization check:\n\n**File:** `yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java`\n\n```java\n// Line 73 — GET /api/roles\n@Override\npublic void listRoles(Context ctx, Empty request, Observer observer) {\n    SecurityStore securityStore = YamcsServer.getServer().getSecurityStore();\n    List roles = securityStore.getDirectory().getRoles();\n    // No ctx.checkSystemPrivilege() call — any authenticated user proceeds\n    ...\n    observer.complete(responseb.build());\n}\n\n// Line 87 — GET /api/ro","public_affected_ranges":[">= 5.13.0, <= 5.13.1"]},{"certainty":"source_listed","source_ids":["sr-12191988e49b86afad6336bfce53fa3d"],"technology":"org.yamcs:yamcs-core","known_exclusions":[],"conditions_summary":"## Summary\n\nMissing authorization checks on three IAM API endpoints (`GET /api/roles`, `GET /api/roles/{name}`, `GET /api/privileges`) allow any authenticated user — regardless of their assigned permissions — to enumerate the complete list of system privileges and role definitions. An attacker with only a low-privilege account (e.g., a read-only operator) can retrieve the full privilege taxonomy of the server, including the names and assignments of all administrator-level capabilities. This information directly enables targeted privilege escalation attacks.\n\n---\n\n## Details\n\nThree handler methods in `IamApi.java` serve sensitive security metadata without performing any authorization check:\n\n**File:** `yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java`\n\n```java\n// Line 73 — GET /api/roles\n@Override\npublic void listRoles(Context ctx, Empty request, Observer observer) {\n    SecurityStore securityStore = YamcsServer.getServer().getSecurityStore();\n    List roles = securityStore.getDirectory().getRoles();\n    // No ctx.checkSystemPrivilege() call — any authenticated user proceeds\n    ...\n    observer.complete(responseb.build());\n}\n\n// Line 87 — GET /api/ro","public_affected_ranges":["<= 5.12.7"]}],"null_published_at":"2026-11-06T07:24:11.259Z","source_updated_at":"2026-08-28T17:13:24.000Z","source_disclosed_at":"2026-08-28T17:13:23.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-02T09:56:23.004Z"},{"id":"NVI-00013863","kind":"vulnerability","title":"Yamcs's Missing Authorization on Role and Privilege Enumeration Endpoints Allows Any Authenticated User to Disclose Full Security Configuration","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-cvw4-55pp-3hfq","CVE-2026-55547"],"plain_summary":"GitHub lists this reviewed advisory for org.yamcs:yamcs-core, org.yamcs:yamcs-core. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-12191988e49b86afad6336bfce53fa3d"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-28T17:13:24.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-12191988e49b86afad6336bfce53fa3d"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-12191988e49b86afad6336bfce53fa3d","url":"https://github.com/advisories/GHSA-cvw4-55pp-3hfq","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-cvw4-55pp-3hfq","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T09:56:23.004Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-12191988e49b86afad6336bfce53fa3d"],"technology":"org.yamcs:yamcs-core","known_exclusions":[],"conditions_summary":"## Summary\n\nMissing authorization checks on three IAM API endpoints (`GET /api/roles`, `GET /api/roles/{name}`, `GET /api/privileges`) allow any authenticated user — regardless of their assigned permissions — to enumerate the complete list of system privileges and role definitions. An attacker with only a low-privilege account (e.g., a read-only operator) can retrieve the full privilege taxonomy of the server, including the names and assignments of all administrator-level capabilities. This information directly enables targeted privilege escalation attacks.\n\n---\n\n## Details\n\nThree handler methods in `IamApi.java` serve sensitive security metadata without performing any authorization check:\n\n**File:** `yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java`\n\n```java\n// Line 73 — GET /api/roles\n@Override\npublic void listRoles(Context ctx, Empty request, Observer observer) {\n    SecurityStore securityStore = YamcsServer.getServer().getSecurityStore();\n    List roles = securityStore.getDirectory().getRoles();\n    // No ctx.checkSystemPrivilege() call — any authenticated user proceeds\n    ...\n    observer.complete(responseb.build());\n}\n\n// Line 87 — GET /api/ro","public_affected_ranges":[">= 5.13.0, <= 5.13.1"]},{"certainty":"source_listed","source_ids":["sr-12191988e49b86afad6336bfce53fa3d"],"technology":"org.yamcs:yamcs-core","known_exclusions":[],"conditions_summary":"## Summary\n\nMissing authorization checks on three IAM API endpoints (`GET /api/roles`, `GET /api/roles/{name}`, `GET /api/privileges`) allow any authenticated user — regardless of their assigned permissions — to enumerate the complete list of system privileges and role definitions. An attacker with only a low-privilege account (e.g., a read-only operator) can retrieve the full privilege taxonomy of the server, including the names and assignments of all administrator-level capabilities. This information directly enables targeted privilege escalation attacks.\n\n---\n\n## Details\n\nThree handler methods in `IamApi.java` serve sensitive security metadata without performing any authorization check:\n\n**File:** `yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java`\n\n```java\n// Line 73 — GET /api/roles\n@Override\npublic void listRoles(Context ctx, Empty request, Observer observer) {\n    SecurityStore securityStore = YamcsServer.getServer().getSecurityStore();\n    List roles = securityStore.getDirectory().getRoles();\n    // No ctx.checkSystemPrivilege() call — any authenticated user proceeds\n    ...\n    observer.complete(responseb.build());\n}\n\n// Line 87 — GET /api/ro","public_affected_ranges":["<= 5.12.7"]}],"null_published_at":"2026-11-02T10:00:37.162Z","source_updated_at":"2026-08-28T17:13:24.000Z","source_disclosed_at":"2026-08-28T17:13:23.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-02T09:56:23.004Z"}],"next_cursor":null,"snapshot_revision":"42594"}