{"items":[{"id":"NVI-00013033","kind":"vulnerability","title":"Mesop: Unauthenticated ANSI Escape Sequence Injection in CSP Reporting Endpoint","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-g7f6-rxc4-qhph","CVE-2026-93421"],"plain_summary":"GitHub lists this reviewed advisory for mesop. 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-14dfe6c11c41eddf7259e69352240fa3"],"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":"2026-11-04T12:03:12.000Z","value":"0.528%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.44813. Missing scores are unknown.","source_id":"sr-14dfe6c11c41eddf7259e69352240fa3"}],"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-429c0c83c7b461775bfa409a45ceed48","url":"https://github.com/advisories/GHSA-g7f6-rxc4-qhph","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-g7f6-rxc4-qhph","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:25:10.521Z"},{"id":"sr-14dfe6c11c41eddf7259e69352240fa3","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-2026-93421","publisher":"FIRST EPSS","observed_at":"2026-11-04T23:33:33.081Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-429c0c83c7b461775bfa409a45ceed48"],"technology":"mesop","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `/__csp__` endpoint accepts unauthenticated JSON reports and logs user-controlled values directly to stdout using `print()` without escaping control characters.\n\nA remote attacker can include ANSI/VT100 escape sequences in fields such as `blocked-uri` or `document-uri`. When the logs are viewed in an ANSI-capable terminal, these sequences can manipulate the displayed output (e.g., clear the screen, hide text, or inject misleading messages), affecting the integrity of operator-facing logs.\n\n### Details\n\nThe CSP reporting endpoint accepts arbitrary JSON and prints several request fields directly:\n\nmesop/server/static_file_serving.py\n```python\n@app.route(prefix_base_url(\"/__csp__\"), methods=[\"POST\"])\ndef csp_report():\n    report = request.get_json(force=True)\n\n    document_uri = report[\"csp-report\"][\"document-uri\"]\n    blocked_uri = report[\"csp-report\"][\"blocked-uri\"]\n    violated_directive = report[\"csp-report\"][\"violated-directive\"]\n\n    print(f\"... Blocked URL: {blocked_uri} ...\")\n```\n\nSince these values are written to stdout without sanitization, ANSI escape sequences supplied by a remote client are preserved and interpreted by ANSI-compatible terminals.\n\n### PoC\n","public_affected_ranges":["<= 1.3.3"]}],"null_published_at":"2026-11-08T19:53:38.926Z","source_updated_at":"2026-09-23T19:01:06.000Z","source_disclosed_at":"2026-09-23T19:01:05.000Z","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":"2026-11-01T07:25:10.521Z"},{"id":"NVI-00013033","kind":"vulnerability","title":"Mesop: Unauthenticated ANSI Escape Sequence Injection in CSP Reporting Endpoint","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-g7f6-rxc4-qhph","CVE-2026-93421"],"plain_summary":"GitHub lists this reviewed advisory for mesop. 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-429c0c83c7b461775bfa409a45ceed48"],"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-429c0c83c7b461775bfa409a45ceed48","url":"https://github.com/advisories/GHSA-g7f6-rxc4-qhph","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-g7f6-rxc4-qhph","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:25:10.521Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-429c0c83c7b461775bfa409a45ceed48"],"technology":"mesop","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `/__csp__` endpoint accepts unauthenticated JSON reports and logs user-controlled values directly to stdout using `print()` without escaping control characters.\n\nA remote attacker can include ANSI/VT100 escape sequences in fields such as `blocked-uri` or `document-uri`. When the logs are viewed in an ANSI-capable terminal, these sequences can manipulate the displayed output (e.g., clear the screen, hide text, or inject misleading messages), affecting the integrity of operator-facing logs.\n\n### Details\n\nThe CSP reporting endpoint accepts arbitrary JSON and prints several request fields directly:\n\nmesop/server/static_file_serving.py\n```python\n@app.route(prefix_base_url(\"/__csp__\"), methods=[\"POST\"])\ndef csp_report():\n    report = request.get_json(force=True)\n\n    document_uri = report[\"csp-report\"][\"document-uri\"]\n    blocked_uri = report[\"csp-report\"][\"blocked-uri\"]\n    violated_directive = report[\"csp-report\"][\"violated-directive\"]\n\n    print(f\"... Blocked URL: {blocked_uri} ...\")\n```\n\nSince these values are written to stdout without sanitization, ANSI escape sequences supplied by a remote client are preserved and interpreted by ANSI-compatible terminals.\n\n### PoC\n","public_affected_ranges":["<= 1.3.3"]}],"null_published_at":"2026-11-01T07:29:12.910Z","source_updated_at":"2026-09-23T19:01:06.000Z","source_disclosed_at":"2026-09-23T19:01:05.000Z","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":"2026-11-01T07:25:10.521Z"}],"next_cursor":null,"snapshot_revision":"42594"}