{"items":[{"id":"NVI-00017922","kind":"vulnerability","title":"ApostropheCMS: Stored XSS via Unescaped Widget Style Attribute Serialization","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-7jg5-frgc-c67w","CVE-2026-112958"],"plain_summary":"OSV carries this publisher advisory for apostrophe. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 4.34.0 for apostrophe. Confirm the publisher’s latest guidance.","source_ids":["sr-952d05790d0c3e8c3aae01658c7d4976"],"action_type":"vendor_patch","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-952d05790d0c3e8c3aae01658c7d4976","url":"https://github.com/advisories/GHSA-7jg5-frgc-c67w","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-7jg5-frgc-c67w","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-11-07T00:53:01.971Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-952d05790d0c3e8c3aae01658c7d4976"],"technology":"apostrophe","known_exclusions":[],"conditions_summary":"## Summary\n\nApostropheCMS widget styles support project-defined schema fields. If a project defines a free-form `string` style field with a CSS `property` and no selector, an editor-controlled value is rendered as an inline CSS declaration. The resulting declaration is then inserted into the widget wrapper's `style=\"...\"` attribute without HTML-attribute escaping.\n\nAn attacker who can edit the widget can include a double quote in the style value, terminate the `style` attribute, and inject new HTML event-handler attributes. The payload is stored with the widget and executes in the Apostrophe site origin whenever the affected published page is rendered.\n\nThis is a sibling of CVE-2026-33889 / `GHSA-97v6-998m-fp4g`. The earlier issue escaped from a `` element through a malicious color value. This variant reaches a different sink related to the automatically generated widget wrapper's inline `style` and `class` attributes.\n\n## Details\n\n### Root Cause 1: Free-form string style values retain HTML metacharacters\n\nThe standard string field converter uses `launder.string()` and length validation. This performs type normalization, not output encoding for an HTML attribute context:\n\n[`","public_affected_ranges":["SEMVER: introduced 0; fixed 4.34.0"]}],"null_published_at":"2026-11-07T00:57:04.326Z","source_updated_at":"2026-10-21T17:28:19.299Z","source_disclosed_at":"2026-10-21T17:15:07.000Z","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":"2026-11-07T00:53:01.971Z"}],"next_cursor":null,"snapshot_revision":"42594"}