{"items":[{"id":"NVI-00012145","kind":"vulnerability","title":"KaTeX: Existing prototype pollution can bypass trust restrictions","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-238p-pmpm-9mq7","CVE-2026-103923"],"plain_summary":"GitHub lists this reviewed advisory for katex. 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-adc60b8ca53acbd2cc34ac2e3055d15b"],"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":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.300%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.22689. Missing scores are unknown.","source_id":"sr-adc60b8ca53acbd2cc34ac2e3055d15b"}],"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-b66f4590deba2f8342acf878c5433c95","url":"https://github.com/advisories/GHSA-238p-pmpm-9mq7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-238p-pmpm-9mq7","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:59:16.959Z"},{"id":"sr-adc60b8ca53acbd2cc34ac2e3055d15b","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-2026-103923","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.063Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b66f4590deba2f8342acf878c5433c95"],"technology":"katex","known_exclusions":[],"conditions_summary":"### Impact\n\nKaTeX can act as a read-side prototype pollution gadget in applications where `Object.prototype` has already been polluted, or where an attacker can influence the prototype of the renderer options object. (KaTeX does not enable said prototype pollution. This advisory applies when combining KaTeX with other vulnerable software that allows for prototype pollution.)\n\nAffected versions may treat inherited properties from `Object.prototype` as renderer options, internal setting metadata, or namespace entries. In particular, an inherited `trust` value will be treated as though the application explicitly enabled trusted rendering, rather than using the documented default of `false`.\n\nWith attacker-controlled mathematical expressions, this can produce links capable of user-interaction cross-site scripting or load attacker-selected external resources. Exploitation requires the consuming application to insert KaTeX output into a web page without a separate sanitizer. (KaTeX does not execute scripts merely by rendering an expression.)\n\nOther inherited settings can alter rendering behavior or resource limits. Inherited setting metadata can affect how defaults and supplied options a","public_affected_ranges":[">= 0.11.0, < 0.18.2"]}],"null_published_at":"2026-11-08T08:10:32.015Z","source_updated_at":"2026-10-05T23:41:06.000Z","source_disclosed_at":"2026-10-05T23:41:05.000Z","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":"2026-11-01T00:59:16.959Z"},{"id":"NVI-00012145","kind":"vulnerability","title":"KaTeX: Existing prototype pollution can bypass trust restrictions","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-238p-pmpm-9mq7","CVE-2026-103923"],"plain_summary":"GitHub lists this reviewed advisory for katex. 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-b66f4590deba2f8342acf878c5433c95"],"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-b66f4590deba2f8342acf878c5433c95","url":"https://github.com/advisories/GHSA-238p-pmpm-9mq7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-238p-pmpm-9mq7","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:59:16.959Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b66f4590deba2f8342acf878c5433c95"],"technology":"katex","known_exclusions":[],"conditions_summary":"### Impact\n\nKaTeX can act as a read-side prototype pollution gadget in applications where `Object.prototype` has already been polluted, or where an attacker can influence the prototype of the renderer options object. (KaTeX does not enable said prototype pollution. This advisory applies when combining KaTeX with other vulnerable software that allows for prototype pollution.)\n\nAffected versions may treat inherited properties from `Object.prototype` as renderer options, internal setting metadata, or namespace entries. In particular, an inherited `trust` value will be treated as though the application explicitly enabled trusted rendering, rather than using the documented default of `false`.\n\nWith attacker-controlled mathematical expressions, this can produce links capable of user-interaction cross-site scripting or load attacker-selected external resources. Exploitation requires the consuming application to insert KaTeX output into a web page without a separate sanitizer. (KaTeX does not execute scripts merely by rendering an expression.)\n\nOther inherited settings can alter rendering behavior or resource limits. Inherited setting metadata can affect how defaults and supplied options a","public_affected_ranges":[">= 0.11.0, < 0.18.2"]}],"null_published_at":"2026-11-01T01:04:01.246Z","source_updated_at":"2026-10-05T23:41:06.000Z","source_disclosed_at":"2026-10-05T23:41:05.000Z","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":"2026-11-01T00:59:16.959Z"}],"next_cursor":null,"snapshot_revision":"42594"}