{"items":[{"id":"NVI-00018447","kind":"vulnerability","title":"Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9cv2-cfxc-v4v2"],"plain_summary":"GitHub lists this reviewed advisory for nokogiri. 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-254921a820bf9e81482909040cc9acde"],"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-254921a820bf9e81482909040cc9acde","url":"https://github.com/advisories/GHSA-9cv2-cfxc-v4v2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9cv2-cfxc-v4v2","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T07:19:16.585Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-254921a820bf9e81482909040cc9acde"],"technology":"nokogiri","known_exclusions":[],"conditions_summary":"### Summary\n\nNokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from `Nokogiri::XML::Node`. This caused a NULL pointer dereference that could crash the process.\n\nNokogiri 1.19.4 checks for missing native data pointers and raises a `RuntimeError`.\n\nJRuby is not affected.\n\n### Severity\n\nThe Nokogiri maintainers have evaluated this as low severity. This is only triggered by a programming error. It requires application code to call `.allocate` directly on a native-backed class and then invoke methods on the resulting uninitialized object. It cannot be triggered by untrusted input or through normal use of the public API.\n\n### Mitigation\n\nUpgrade to Nokogiri 1.19.4 or later.\n\nAvoid calling `.allocate` directly on Nokogiri native-backed classes. Use the documented constructors and factory methods instead.\n\n### Credit\n\nThis issue was responsibly reported by Zheng Yu from depthfirst.com.","public_affected_ranges":["< 1.19.4"]}],"null_published_at":"2026-11-07T07:07:39.837Z","source_updated_at":"2026-06-19T16:36:25.000Z","source_disclosed_at":"2026-06-19T16:36:23.000Z","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":"2026-11-06T07:19:16.585Z"}],"next_cursor":null,"snapshot_revision":"42594"}