{"items":[{"id":"NVI-00015108","kind":"vulnerability","title":"vm2's bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike","revision":2,"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-gmc2-2x9w-cgh9","CVE-2026-47683"],"plain_summary":"GitHub lists this reviewed advisory for vm2. 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-57fbf94d1638d4f62c253739061dd96a"],"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":"2026-10-23T16:10:00.313Z","value":"8.7 HIGH (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-57fbf94d1638d4f62c253739061dd96a"}],"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-22e5d9319f04b695b15deaaa6dd3c7a7","url":"https://github.com/advisories/GHSA-gmc2-2x9w-cgh9","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gmc2-2x9w-cgh9","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:15:44.568Z"},{"id":"sr-57fbf94d1638d4f62c253739061dd96a","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47683","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-47683","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T01:47:43.921Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-22e5d9319f04b695b15deaaa6dd3c7a7"],"technology":"vm2","known_exclusions":[],"conditions_summary":"## Summary\n\nvm2 bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike\n\nThe `bufferAllocLimit` option introduced in 3.11.0 (GHSA-6785-pvv7-mvg7) caps host-side Buffer allocations driven by sandbox code, the way embedders opt into `timeout`. The cap wraps `Buffer.alloc`, `Buffer.allocUnsafe`, `Buffer.allocUnsafeSlow`, and the deprecated `Buffer(N)` / `new Buffer(N)` forms. Two other API paths reach the same host C++ allocator with an attacker-controlled size and are not capped: `Buffer.concat(list, totalLength)` and `Buffer.from(arrayLike)` with a fake `length`. Sandbox code can use either to allocate an arbitrary number of host external bytes in a single call, defeating the explicit DoS mitigation the embedder configured.\n\n## Details\n\n`lib/setup-sandbox.js` installs `checkBufferAllocLimit` at every wrapped entry to host Buffer allocation:\n\n- `alloc()` at `lib/setup-sandbox.js:474` and the `connect(alloc, host.Buffer.alloc)` at line 480.\n- `allocUnsafe()` at line 488 and `connect(allocUnsafe, host.Buffer.allocUnsafe)` at line 496.\n- `allocUnsafeSlow()` at line 504 and `connect(allocUnsafeSlow, host.Buffer.allocUnsafeSlow)` at line 510.\n- `BufferHandler.apply` at li","public_affected_ranges":["<= 3.11.5"]}],"null_published_at":"2026-11-08T19:53:44.059Z","source_updated_at":"2026-08-17T17:32:11.000Z","source_disclosed_at":"2026-08-17T17:32:10.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-02T20:15:44.568Z"},{"id":"NVI-00015108","kind":"vulnerability","title":"vm2's bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gmc2-2x9w-cgh9","CVE-2026-47683"],"plain_summary":"GitHub lists this reviewed advisory for vm2. 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-22e5d9319f04b695b15deaaa6dd3c7a7"],"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":[],"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-22e5d9319f04b695b15deaaa6dd3c7a7","url":"https://github.com/advisories/GHSA-gmc2-2x9w-cgh9","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gmc2-2x9w-cgh9","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:15:44.568Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-22e5d9319f04b695b15deaaa6dd3c7a7"],"technology":"vm2","known_exclusions":[],"conditions_summary":"## Summary\n\nvm2 bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike\n\nThe `bufferAllocLimit` option introduced in 3.11.0 (GHSA-6785-pvv7-mvg7) caps host-side Buffer allocations driven by sandbox code, the way embedders opt into `timeout`. The cap wraps `Buffer.alloc`, `Buffer.allocUnsafe`, `Buffer.allocUnsafeSlow`, and the deprecated `Buffer(N)` / `new Buffer(N)` forms. Two other API paths reach the same host C++ allocator with an attacker-controlled size and are not capped: `Buffer.concat(list, totalLength)` and `Buffer.from(arrayLike)` with a fake `length`. Sandbox code can use either to allocate an arbitrary number of host external bytes in a single call, defeating the explicit DoS mitigation the embedder configured.\n\n## Details\n\n`lib/setup-sandbox.js` installs `checkBufferAllocLimit` at every wrapped entry to host Buffer allocation:\n\n- `alloc()` at `lib/setup-sandbox.js:474` and the `connect(alloc, host.Buffer.alloc)` at line 480.\n- `allocUnsafe()` at line 488 and `connect(allocUnsafe, host.Buffer.allocUnsafe)` at line 496.\n- `allocUnsafeSlow()` at line 504 and `connect(allocUnsafeSlow, host.Buffer.allocUnsafeSlow)` at line 510.\n- `BufferHandler.apply` at li","public_affected_ranges":["<= 3.11.5"]}],"null_published_at":"2026-11-03T10:03:26.549Z","source_updated_at":"2026-08-17T17:32:11.000Z","source_disclosed_at":"2026-08-17T17:32:10.000Z","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":"2026-11-02T20:15:44.568Z"}],"next_cursor":null,"snapshot_revision":"42594"}