{"items":[{"id":"NVI-00018498","kind":"vulnerability","title":"Mistune has XSS via unescaped figclass/figwidth in Figure directive","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-58cw-g322-p94v","CVE-2026-44896"],"plain_summary":"GitHub lists this reviewed advisory for mistune. 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-30c9be352b80f170b1d4231e6d49dbf3"],"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":"2026-06-08T23:34:19.000Z","value":"6.1 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-30c9be352b80f170b1d4231e6d49dbf3"}],"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-30c9be352b80f170b1d4231e6d49dbf3","url":"https://github.com/advisories/GHSA-58cw-g322-p94v","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-58cw-g322-p94v","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:50:36.189Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-30c9be352b80f170b1d4231e6d49dbf3"],"technology":"mistune","known_exclusions":[],"conditions_summary":"In `src/mistune/directives/image.py`, the `render_figure()` function concatenates `figclass` and `figwidth` options directly into HTML attributes without escaping (lines 152-168).\n\nThis allows attribute injection and XSS even when `HTMLRenderer(escape=True)` is used, because these values bypass the inline renderer.\n\nOther attributes in the same file (src, alt, style) are properly escaped; figclass/figwidth were missed.","public_affected_ranges":["<= 3.2.0"]}],"null_published_at":"2026-11-07T07:07:39.843Z","source_updated_at":"2026-06-08T23:34:19.000Z","source_disclosed_at":"2026-05-08T23:43:12.000Z","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":"2026-11-07T00:50:36.189Z"}],"next_cursor":null,"snapshot_revision":"42594"}