{"items":[{"id":"NVI-00015277","kind":"vulnerability","title":"Cloudreve: Broken Access Control in file event stream: a single-file share recipient is subscribed to the owner's parent folder and receives activity events for unshared siblings","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-w8x7-h2px-xmq8","CVE-2026-55499"],"plain_summary":"GitHub lists this reviewed advisory for github.com/cloudreve/Cloudreve/v4, github.com/cloudreve/Cloudreve/v3. 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-1ae46cca4767b0cbb0cf4b89c8b61999"],"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":"2026-07-24T20:49:04.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-507abec421d3735a54132a7f42b4eed6"},{"kind":"CVSS","as_of":"2026-09-08T20:51:43.490Z","value":"4.3 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-17057fdc8b206c364e09004120b61429"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.331%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.2633. Missing scores are unknown.","source_id":"sr-1ae46cca4767b0cbb0cf4b89c8b61999"}],"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-507abec421d3735a54132a7f42b4eed6","url":"https://github.com/advisories/GHSA-w8x7-h2px-xmq8","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w8x7-h2px-xmq8","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:59:13.529Z"},{"id":"sr-17057fdc8b206c364e09004120b61429","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55499","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-55499","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T01:48:26.418Z"},{"id":"sr-1ae46cca4767b0cbb0cf4b89c8b61999","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-2026-55499","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.788Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-507abec421d3735a54132a7f42b4eed6"],"technology":"github.com/cloudreve/Cloudreve/v4","known_exclusions":[],"conditions_summary":"## Summary\n \nWhen an authenticated recipient of a **single-file** share opens the file event stream (`GET /api/v4/file/events?uri=`), Cloudreve validates the URI by listing it and then subscribes the caller to `parent.ID()`. For a single-file share, the share navigator resolves the bare share-root URI to the **owner-side parent folder** of the shared file (not the file), while the visible listing is filtered down to just the shared file. The event hub then keys topics by numeric file ID only and, on each file change, fans the event out to subscribers of **every ancestor topic**, filtering only the client ID that caused the event — never the subscriber's share scope.\n \nConsequently, a recipient of one shared file can receive Server-Sent Events (type, sibling path/name, rename target, hashed file ID) for other files and subfolders in the owner's parent folder that were never shared. Contents are not disclosed; file-activity metadata is.\n\n### Details\n## Root cause (verified at `26b6b10`)\n \n**1. Events route — authenticated, feature-flagged, no share-scope check** (`routers/router.go`):\n```go\nfile := v4.Group(\"file\"); file.Use(middleware.RequiredScopes(types.ScopeFilesRead)","public_affected_ranges":["< 4.0.0-20260613030215-0b00dd308f13"]},{"certainty":"source_listed","source_ids":["sr-507abec421d3735a54132a7f42b4eed6"],"technology":"github.com/cloudreve/Cloudreve/v3","known_exclusions":[],"conditions_summary":"## Summary\n \nWhen an authenticated recipient of a **single-file** share opens the file event stream (`GET /api/v4/file/events?uri=`), Cloudreve validates the URI by listing it and then subscribes the caller to `parent.ID()`. For a single-file share, the share navigator resolves the bare share-root URI to the **owner-side parent folder** of the shared file (not the file), while the visible listing is filtered down to just the shared file. The event hub then keys topics by numeric file ID only and, on each file change, fans the event out to subscribers of **every ancestor topic**, filtering only the client ID that caused the event — never the subscriber's share scope.\n \nConsequently, a recipient of one shared file can receive Server-Sent Events (type, sibling path/name, rename target, hashed file ID) for other files and subfolders in the owner's parent folder that were never shared. Contents are not disclosed; file-activity metadata is.\n\n### Details\n## Root cause (verified at `26b6b10`)\n \n**1. Events route — authenticated, feature-flagged, no share-scope check** (`routers/router.go`):\n```go\nfile := v4.Group(\"file\"); file.Use(middleware.RequiredScopes(types.ScopeFilesRead)","public_affected_ranges":["<= 3.0.0-20250225100611-da4e44b77af4"]}],"null_published_at":"2026-11-08T19:53:44.028Z","source_updated_at":"2026-07-24T20:49:04.000Z","source_disclosed_at":"2026-07-24T20:49:02.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-03T09:59:13.529Z"},{"id":"NVI-00015277","kind":"vulnerability","title":"Cloudreve: Broken Access Control in file event stream: a single-file share recipient is subscribed to the owner's parent folder and receives activity events for unshared siblings","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w8x7-h2px-xmq8","CVE-2026-55499"],"plain_summary":"GitHub lists this reviewed advisory for github.com/cloudreve/Cloudreve/v4, github.com/cloudreve/Cloudreve/v3. 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-1ae46cca4767b0cbb0cf4b89c8b61999"],"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":"2026-07-24T20:49:04.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-507abec421d3735a54132a7f42b4eed6"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.331%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.2633. Missing scores are unknown.","source_id":"sr-1ae46cca4767b0cbb0cf4b89c8b61999"}],"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-507abec421d3735a54132a7f42b4eed6","url":"https://github.com/advisories/GHSA-w8x7-h2px-xmq8","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w8x7-h2px-xmq8","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:59:13.529Z"},{"id":"sr-1ae46cca4767b0cbb0cf4b89c8b61999","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-2026-55499","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.788Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-507abec421d3735a54132a7f42b4eed6"],"technology":"github.com/cloudreve/Cloudreve/v4","known_exclusions":[],"conditions_summary":"## Summary\n \nWhen an authenticated recipient of a **single-file** share opens the file event stream (`GET /api/v4/file/events?uri=`), Cloudreve validates the URI by listing it and then subscribes the caller to `parent.ID()`. For a single-file share, the share navigator resolves the bare share-root URI to the **owner-side parent folder** of the shared file (not the file), while the visible listing is filtered down to just the shared file. The event hub then keys topics by numeric file ID only and, on each file change, fans the event out to subscribers of **every ancestor topic**, filtering only the client ID that caused the event — never the subscriber's share scope.\n \nConsequently, a recipient of one shared file can receive Server-Sent Events (type, sibling path/name, rename target, hashed file ID) for other files and subfolders in the owner's parent folder that were never shared. Contents are not disclosed; file-activity metadata is.\n\n### Details\n## Root cause (verified at `26b6b10`)\n \n**1. Events route — authenticated, feature-flagged, no share-scope check** (`routers/router.go`):\n```go\nfile := v4.Group(\"file\"); file.Use(middleware.RequiredScopes(types.ScopeFilesRead)","public_affected_ranges":["< 4.0.0-20260613030215-0b00dd308f13"]},{"certainty":"source_listed","source_ids":["sr-507abec421d3735a54132a7f42b4eed6"],"technology":"github.com/cloudreve/Cloudreve/v3","known_exclusions":[],"conditions_summary":"## Summary\n \nWhen an authenticated recipient of a **single-file** share opens the file event stream (`GET /api/v4/file/events?uri=`), Cloudreve validates the URI by listing it and then subscribes the caller to `parent.ID()`. For a single-file share, the share navigator resolves the bare share-root URI to the **owner-side parent folder** of the shared file (not the file), while the visible listing is filtered down to just the shared file. The event hub then keys topics by numeric file ID only and, on each file change, fans the event out to subscribers of **every ancestor topic**, filtering only the client ID that caused the event — never the subscriber's share scope.\n \nConsequently, a recipient of one shared file can receive Server-Sent Events (type, sibling path/name, rename target, hashed file ID) for other files and subfolders in the owner's parent folder that were never shared. Contents are not disclosed; file-activity metadata is.\n\n### Details\n## Root cause (verified at `26b6b10`)\n \n**1. Events route — authenticated, feature-flagged, no share-scope check** (`routers/router.go`):\n```go\nfile := v4.Group(\"file\"); file.Use(middleware.RequiredScopes(types.ScopeFilesRead)","public_affected_ranges":["<= 3.0.0-20250225100611-da4e44b77af4"]}],"null_published_at":"2026-11-07T14:01:55.394Z","source_updated_at":"2026-07-24T20:49:04.000Z","source_disclosed_at":"2026-07-24T20:49:02.000Z","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":"2026-11-03T09:59:13.529Z"},{"id":"NVI-00015277","kind":"vulnerability","title":"Cloudreve: Broken Access Control in file event stream: a single-file share recipient is subscribed to the owner's parent folder and receives activity events for unshared siblings","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w8x7-h2px-xmq8","CVE-2026-55499"],"plain_summary":"GitHub lists this reviewed advisory for github.com/cloudreve/Cloudreve/v4, github.com/cloudreve/Cloudreve/v3. 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-507abec421d3735a54132a7f42b4eed6"],"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":"2026-07-24T20:49:04.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-507abec421d3735a54132a7f42b4eed6"}],"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-507abec421d3735a54132a7f42b4eed6","url":"https://github.com/advisories/GHSA-w8x7-h2px-xmq8","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w8x7-h2px-xmq8","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:59:13.529Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-507abec421d3735a54132a7f42b4eed6"],"technology":"github.com/cloudreve/Cloudreve/v4","known_exclusions":[],"conditions_summary":"## Summary\n \nWhen an authenticated recipient of a **single-file** share opens the file event stream (`GET /api/v4/file/events?uri=`), Cloudreve validates the URI by listing it and then subscribes the caller to `parent.ID()`. For a single-file share, the share navigator resolves the bare share-root URI to the **owner-side parent folder** of the shared file (not the file), while the visible listing is filtered down to just the shared file. The event hub then keys topics by numeric file ID only and, on each file change, fans the event out to subscribers of **every ancestor topic**, filtering only the client ID that caused the event — never the subscriber's share scope.\n \nConsequently, a recipient of one shared file can receive Server-Sent Events (type, sibling path/name, rename target, hashed file ID) for other files and subfolders in the owner's parent folder that were never shared. Contents are not disclosed; file-activity metadata is.\n\n### Details\n## Root cause (verified at `26b6b10`)\n \n**1. Events route — authenticated, feature-flagged, no share-scope check** (`routers/router.go`):\n```go\nfile := v4.Group(\"file\"); file.Use(middleware.RequiredScopes(types.ScopeFilesRead)","public_affected_ranges":["< 4.0.0-20260613030215-0b00dd308f13"]},{"certainty":"source_listed","source_ids":["sr-507abec421d3735a54132a7f42b4eed6"],"technology":"github.com/cloudreve/Cloudreve/v3","known_exclusions":[],"conditions_summary":"## Summary\n \nWhen an authenticated recipient of a **single-file** share opens the file event stream (`GET /api/v4/file/events?uri=`), Cloudreve validates the URI by listing it and then subscribes the caller to `parent.ID()`. For a single-file share, the share navigator resolves the bare share-root URI to the **owner-side parent folder** of the shared file (not the file), while the visible listing is filtered down to just the shared file. The event hub then keys topics by numeric file ID only and, on each file change, fans the event out to subscribers of **every ancestor topic**, filtering only the client ID that caused the event — never the subscriber's share scope.\n \nConsequently, a recipient of one shared file can receive Server-Sent Events (type, sibling path/name, rename target, hashed file ID) for other files and subfolders in the owner's parent folder that were never shared. Contents are not disclosed; file-activity metadata is.\n\n### Details\n## Root cause (verified at `26b6b10`)\n \n**1. Events route — authenticated, feature-flagged, no share-scope check** (`routers/router.go`):\n```go\nfile := v4.Group(\"file\"); file.Use(middleware.RequiredScopes(types.ScopeFilesRead)","public_affected_ranges":["<= 3.0.0-20250225100611-da4e44b77af4"]}],"null_published_at":"2026-11-03T10:03:26.566Z","source_updated_at":"2026-07-24T20:49:04.000Z","source_disclosed_at":"2026-07-24T20:49:02.000Z","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":"2026-11-03T09:59:13.529Z"}],"next_cursor":null,"snapshot_revision":"42594"}