{"items":[{"id":"NVI-00008862","kind":"vulnerability","title":"deepmerge mergeObject() allows prototype poisoning of returned objects","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gcqx-w48m-w2h4","CVE-2026-93753"],"plain_summary":"GitHub lists this reviewed advisory for deepmerge. 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-3de5ab389cddacc0d917dba91ad1b71a"],"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":"2026-10-27T21:34:58.000Z","value":"5.3 low","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0d4e4bd533999f70da3fb662a99a4fae"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.514%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.43823. Missing scores are unknown.","source_id":"sr-3de5ab389cddacc0d917dba91ad1b71a"}],"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-0d4e4bd533999f70da3fb662a99a4fae","url":"https://github.com/advisories/GHSA-gcqx-w48m-w2h4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gcqx-w48m-w2h4","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-07c8df63b31b0fab1339678762ae3522","url":"https://github.com/advisories/GHSA-gcqx-w48m-w2h4","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-gcqx-w48m-w2h4","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-11-02T02:20:49.907Z"},{"id":"sr-3de5ab389cddacc0d917dba91ad1b71a","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-2026-93753","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.386Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0d4e4bd533999f70da3fb662a99a4fae"],"technology":"deepmerge","known_exclusions":[],"conditions_summary":"deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks.","public_affected_ranges":[">= 4.2.0, <= 4.3.1"]},{"certainty":"source_listed","source_ids":["sr-07c8df63b31b0fab1339678762ae3522"],"technology":"deepmerge","known_exclusions":[],"conditions_summary":"deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks.","public_affected_ranges":["SEMVER: introduced 4.2.0; last_affected 4.3.1"]}],"null_published_at":"2026-11-02T20:21:10.344Z","source_updated_at":"2026-10-27T21:34:58.000Z","source_disclosed_at":"2026-09-18T18:31:44.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:56:36.327Z"},{"id":"NVI-00008862","kind":"vulnerability","title":"deepmerge mergeObject() allows prototype poisoning of returned objects","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gcqx-w48m-w2h4","CVE-2026-93753"],"plain_summary":"GitHub lists this reviewed advisory for deepmerge. 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-3de5ab389cddacc0d917dba91ad1b71a"],"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":"2026-10-27T21:34:58.000Z","value":"5.3 low","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0d4e4bd533999f70da3fb662a99a4fae"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.514%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.43823. Missing scores are unknown.","source_id":"sr-3de5ab389cddacc0d917dba91ad1b71a"}],"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-0d4e4bd533999f70da3fb662a99a4fae","url":"https://github.com/advisories/GHSA-gcqx-w48m-w2h4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gcqx-w48m-w2h4","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-3de5ab389cddacc0d917dba91ad1b71a","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-2026-93753","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.386Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0d4e4bd533999f70da3fb662a99a4fae"],"technology":"deepmerge","known_exclusions":[],"conditions_summary":"deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks.","public_affected_ranges":[">= 4.2.0, <= 4.3.1"]}],"null_published_at":"2026-10-31T23:18:17.194Z","source_updated_at":"2026-10-27T21:34:58.000Z","source_disclosed_at":"2026-09-18T18:31:44.000Z","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":"2026-10-31T21:56:36.327Z"},{"id":"NVI-00008862","kind":"vulnerability","title":"deepmerge mergeObject() allows prototype poisoning of returned objects","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gcqx-w48m-w2h4","CVE-2026-93753"],"plain_summary":"GitHub lists this reviewed advisory for deepmerge. 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-0d4e4bd533999f70da3fb662a99a4fae"],"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":"2026-10-27T21:34:58.000Z","value":"5.3 low","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0d4e4bd533999f70da3fb662a99a4fae"}],"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-0d4e4bd533999f70da3fb662a99a4fae","url":"https://github.com/advisories/GHSA-gcqx-w48m-w2h4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gcqx-w48m-w2h4","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0d4e4bd533999f70da3fb662a99a4fae"],"technology":"deepmerge","known_exclusions":[],"conditions_summary":"deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks.","public_affected_ranges":[">= 4.2.0, <= 4.3.1"]}],"null_published_at":"2026-10-31T22:13:27.120Z","source_updated_at":"2026-10-27T21:34:58.000Z","source_disclosed_at":"2026-09-18T18:31:44.000Z","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":"2026-10-31T21:56:36.327Z"}],"next_cursor":null,"snapshot_revision":"42594"}