{"items":[{"id":"NVI-00012207","kind":"vulnerability","title":"vm2: NodeVM custom resolution bypasses external path boundaries","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5h3f-q97h-ccvc","CVE-2026-100721"],"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-5d466e6fbaef37cfd7d6f408d1d5226a"],"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":"2026-10-05T23:24:30.000Z","value":"10 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0b9a37f22db5d17b666eeaf099db9122"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.591%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.48274. Missing scores are unknown.","source_id":"sr-5d466e6fbaef37cfd7d6f408d1d5226a"}],"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-0b9a37f22db5d17b666eeaf099db9122","url":"https://github.com/advisories/GHSA-5h3f-q97h-ccvc","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-5h3f-q97h-ccvc","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T01:39:10.636Z"},{"id":"sr-5d466e6fbaef37cfd7d6f408d1d5226a","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-2026-100721","publisher":"FIRST EPSS","observed_at":"2026-11-01T07:23:29.864Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0b9a37f22db5d17b666eeaf099db9122"],"technology":"vm2","known_exclusions":[],"conditions_summary":"## Summary\n\nAt source revision `91034466bfb7f56b95fd48083ec6ca36d058f164` of vm2 3.11.8, an untrusted `NodeVM` guest can turn one allowlisted custom-resolved module into authorization for a separate file whose path merely shares the resolved path's string prefix. `LegacyResolver.customResolve` stores the resolved path in `this.externals` as `^` without an end or separator boundary; a later absolute require of a sibling such as `foo2/index.js` therefore passes the external check and is loaded through `hostRequire` when the configured context is `host`. The decisive attack loaded `foo` as `FOO_OK` and then executed the prefix-sharing sibling, which returned `PREFIX_PWN` after invoking `child_process`; an otherwise identical control denied the sibling with `ENOTFOUND`.\n\n## Technical Details\n\nThe affected configuration is a documented `NodeVM` use in which the embedder sets `require.external` to `{modules: ['foo'], transitive: false}`, supplies a custom resolver that returns the `foo` directory, sets a root directory, and uses `context: 'host'`. The guest controls the `require` specifiers and requests the allowlisted bare name before requesting the absolute path of the prefix-sha","public_affected_ranges":["<= 3.12.1"]}],"null_published_at":"2026-11-01T22:58:19.132Z","source_updated_at":"2026-10-05T23:24:30.000Z","source_disclosed_at":"2026-10-05T23:24:29.000Z","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":"2026-11-01T01:39:10.636Z"},{"id":"NVI-00012207","kind":"vulnerability","title":"vm2: NodeVM custom resolution bypasses external path boundaries","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5h3f-q97h-ccvc","CVE-2026-100721"],"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-0b9a37f22db5d17b666eeaf099db9122"],"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":"2026-10-05T23:24:30.000Z","value":"10 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0b9a37f22db5d17b666eeaf099db9122"}],"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-0b9a37f22db5d17b666eeaf099db9122","url":"https://github.com/advisories/GHSA-5h3f-q97h-ccvc","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-5h3f-q97h-ccvc","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T01:39:10.636Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0b9a37f22db5d17b666eeaf099db9122"],"technology":"vm2","known_exclusions":[],"conditions_summary":"## Summary\n\nAt source revision `91034466bfb7f56b95fd48083ec6ca36d058f164` of vm2 3.11.8, an untrusted `NodeVM` guest can turn one allowlisted custom-resolved module into authorization for a separate file whose path merely shares the resolved path's string prefix. `LegacyResolver.customResolve` stores the resolved path in `this.externals` as `^` without an end or separator boundary; a later absolute require of a sibling such as `foo2/index.js` therefore passes the external check and is loaded through `hostRequire` when the configured context is `host`. The decisive attack loaded `foo` as `FOO_OK` and then executed the prefix-sharing sibling, which returned `PREFIX_PWN` after invoking `child_process`; an otherwise identical control denied the sibling with `ENOTFOUND`.\n\n## Technical Details\n\nThe affected configuration is a documented `NodeVM` use in which the embedder sets `require.external` to `{modules: ['foo'], transitive: false}`, supplies a custom resolver that returns the `foo` directory, sets a root directory, and uses `context: 'host'`. The guest controls the `require` specifiers and requests the allowlisted bare name before requesting the absolute path of the prefix-sha","public_affected_ranges":["<= 3.12.1"]}],"null_published_at":"2026-11-01T01:45:38.498Z","source_updated_at":"2026-10-05T23:24:30.000Z","source_disclosed_at":"2026-10-05T23:24:29.000Z","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":"2026-11-01T01:39:10.636Z"}],"next_cursor":null,"snapshot_revision":"42594"}