{"items":[{"id":"NVI-00013268","kind":"vulnerability","title":"vm2: vm.freeze()/vm.readonly() bypass via accessor descriptor","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-633r-hq9m-c4ff","CVE-2026-92949"],"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-1d8228b4ab91b059bcb3036f89895bad"],"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":"2026-10-01T15:35:26.000Z","value":"4 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-ace9dea28265550cd43bc9c82a24d2c8"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.319%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.24825. Missing scores are unknown.","source_id":"sr-1d8228b4ab91b059bcb3036f89895bad"}],"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-ace9dea28265550cd43bc9c82a24d2c8","url":"https://github.com/advisories/GHSA-633r-hq9m-c4ff","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-633r-hq9m-c4ff","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T01:40:00.567Z"},{"id":"sr-1d8228b4ab91b059bcb3036f89895bad","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-2026-92949","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:17:01.146Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-ace9dea28265550cd43bc9c82a24d2c8"],"technology":"vm2","known_exclusions":[],"conditions_summary":"### Summary\nUntrusted JavaScript running inside `new VM().run()` / `new NodeVM().run()` can bypass `vm.freeze()` / `vm.readonly()` and mutate a host object the embedder explicitly marked read-only - the documented contract is \"prevent sandboxed scripts from adding, changing, or deleting properties\". If the frozen host object has an accessor (get/set) own-property, the sandbox can read the host setter back out via `Object.getOwnPropertyDescriptor()` and call it directly; the call lands in `BaseHandler.apply` which unwraps the readonly proxy to the raw host object and runs the host setter against it. No non-default `VM`/`NodeVM` options are required; the only precondition is that the embedder froze an object whose shape includes an accessor property. A second route to the same sink exists via `__lookupSetter__`.\n\n### PoC\n```js\n// poc.js\n'use strict';\nconst { VM } = require('vm2');\n\nlet _level = 'safe';\nconst hostConfig = Object.defineProperty({}, 'level', {\n  get() { return _level; },\n  set(v) { _level = String(v); },\n  enumerable: true, configurable: true,\n});\n\nconst vm = new VM();\nvm.freeze(hostConfig, 'cfg');\n\n// Baseline - documented barriers hold:\nvm.run(`cfg.level = 'via-set';`","public_affected_ranges":[">= 3.9.6, <= 3.11.6"]}],"null_published_at":"2026-11-07T14:01:58.725Z","source_updated_at":"2026-10-01T15:35:26.000Z","source_disclosed_at":"2026-10-01T15:35:25.000Z","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":"2026-11-01T01:40:00.567Z"},{"id":"NVI-00013268","kind":"vulnerability","title":"vm2: vm.freeze()/vm.readonly() bypass via accessor descriptor","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-633r-hq9m-c4ff","CVE-2026-92949"],"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-ace9dea28265550cd43bc9c82a24d2c8"],"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":"2026-10-01T15:35:26.000Z","value":"4 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-ace9dea28265550cd43bc9c82a24d2c8"}],"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-ace9dea28265550cd43bc9c82a24d2c8","url":"https://github.com/advisories/GHSA-633r-hq9m-c4ff","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-633r-hq9m-c4ff","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T01:40:00.567Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-ace9dea28265550cd43bc9c82a24d2c8"],"technology":"vm2","known_exclusions":[],"conditions_summary":"### Summary\nUntrusted JavaScript running inside `new VM().run()` / `new NodeVM().run()` can bypass `vm.freeze()` / `vm.readonly()` and mutate a host object the embedder explicitly marked read-only - the documented contract is \"prevent sandboxed scripts from adding, changing, or deleting properties\". If the frozen host object has an accessor (get/set) own-property, the sandbox can read the host setter back out via `Object.getOwnPropertyDescriptor()` and call it directly; the call lands in `BaseHandler.apply` which unwraps the readonly proxy to the raw host object and runs the host setter against it. No non-default `VM`/`NodeVM` options are required; the only precondition is that the embedder froze an object whose shape includes an accessor property. A second route to the same sink exists via `__lookupSetter__`.\n\n### PoC\n```js\n// poc.js\n'use strict';\nconst { VM } = require('vm2');\n\nlet _level = 'safe';\nconst hostConfig = Object.defineProperty({}, 'level', {\n  get() { return _level; },\n  set(v) { _level = String(v); },\n  enumerable: true, configurable: true,\n});\n\nconst vm = new VM();\nvm.freeze(hostConfig, 'cfg');\n\n// Baseline - documented barriers hold:\nvm.run(`cfg.level = 'via-set';`","public_affected_ranges":[">= 3.9.6, <= 3.11.6"]}],"null_published_at":"2026-11-01T07:29:12.933Z","source_updated_at":"2026-10-01T15:35:26.000Z","source_disclosed_at":"2026-10-01T15:35:25.000Z","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":"2026-11-01T01:40:00.567Z"}],"next_cursor":null,"snapshot_revision":"42594"}