{"items":[{"id":"NVI-00015199","kind":"vulnerability","title":"Mermaid Architecture diagrams are vulnerable to prototype pollution","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-3rrr-jr9j-h3q3","CVE-2026-71437"],"plain_summary":"GitHub lists this reviewed advisory for mermaid. 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-590835cc6ba45aee965514f706f71aaf"],"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":"2026-10-24T15:10:00.190Z","value":"6.5 MEDIUM (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-590835cc6ba45aee965514f706f71aaf"}],"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-3ccc04736f92079f8ddda89613f8e231","url":"https://github.com/advisories/GHSA-3rrr-jr9j-h3q3","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3rrr-jr9j-h3q3","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T02:28:46.523Z"},{"id":"sr-590835cc6ba45aee965514f706f71aaf","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71437","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-71437","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T15:08:07.832Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3ccc04736f92079f8ddda89613f8e231"],"technology":"mermaid","known_exclusions":[],"conditions_summary":"Rendering an untrusted `architecture-beta` diagram lets the diagram author write an arbitrary property with the value `horizontal` or `vertical` onto `Object.prototype`. A group id of `__proto__` is accepted as a valid parent.\n\n### Impact\n\nAny code in the same realm that reads a property of that name from an arbitrary object, or enumerates an object with bare `for...in`, observes the injected value (which can only be the string `horizontal` or `vertical`.\n\nThis may mean corrupted option/config defaults, bypassed truthiness checks, causing denial of service or logic corruption in the embedding application.\n\nBecause the injected value cannot be an object or function, this is not directly exploitable for remote code execution.\n\n### PoC\n\n```\narchitecture-beta\n      group mermaidPrototypePollutionMarker(cloud)[Marker]\n      service a(server)[A] in __proto__\n      service b(server)[B] in mermaidPrototypePollutionMarker\n      a:R -- L:b\n```\n\nThe vulnerable write was introduced in commit cb0a4703bdf01d47508bde1c08aa9a980d70bc20 and first shipped in `mermaid@11.5.0`. The lines are unchanged in every rel","public_affected_ranges":[">= 11.5.0, < 11.16.1"]}],"null_published_at":"2026-11-08T19:53:44.059Z","source_updated_at":"2026-08-06T19:52:01.000Z","source_disclosed_at":"2026-08-06T19:51:59.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-03T02:28:46.523Z"},{"id":"NVI-00015199","kind":"vulnerability","title":"Mermaid Architecture diagrams are vulnerable to prototype pollution","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-3rrr-jr9j-h3q3","CVE-2026-71437"],"plain_summary":"GitHub lists this reviewed advisory for mermaid. 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-3ccc04736f92079f8ddda89613f8e231"],"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-3ccc04736f92079f8ddda89613f8e231","url":"https://github.com/advisories/GHSA-3rrr-jr9j-h3q3","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3rrr-jr9j-h3q3","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T02:28:46.523Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3ccc04736f92079f8ddda89613f8e231"],"technology":"mermaid","known_exclusions":[],"conditions_summary":"Rendering an untrusted `architecture-beta` diagram lets the diagram author write an arbitrary property with the value `horizontal` or `vertical` onto `Object.prototype`. A group id of `__proto__` is accepted as a valid parent.\n\n### Impact\n\nAny code in the same realm that reads a property of that name from an arbitrary object, or enumerates an object with bare `for...in`, observes the injected value (which can only be the string `horizontal` or `vertical`.\n\nThis may mean corrupted option/config defaults, bypassed truthiness checks, causing denial of service or logic corruption in the embedding application.\n\nBecause the injected value cannot be an object or function, this is not directly exploitable for remote code execution.\n\n### PoC\n\n```\narchitecture-beta\n      group mermaidPrototypePollutionMarker(cloud)[Marker]\n      service a(server)[A] in __proto__\n      service b(server)[B] in mermaidPrototypePollutionMarker\n      a:R -- L:b\n```\n\nThe vulnerable write was introduced in commit cb0a4703bdf01d47508bde1c08aa9a980d70bc20 and first shipped in `mermaid@11.5.0`. The lines are unchanged in every rel","public_affected_ranges":[">= 11.5.0, < 11.16.1"]}],"null_published_at":"2026-11-03T10:03:26.560Z","source_updated_at":"2026-08-06T19:52:01.000Z","source_disclosed_at":"2026-08-06T19:51:59.000Z","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":"2026-11-03T02:28:46.523Z"}],"next_cursor":null,"snapshot_revision":"42594"}