{"items":[{"id":"NVI-00014168","kind":"vulnerability","title":"Nodemailer: Quadratic (O(n²)) time complexity in addressparser allows remote denial of service via a crafted address list","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-2x7j-588g-ccc2"],"plain_summary":"GitHub lists this reviewed advisory for nodemailer. 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-54349b470ef366855336c7d2b98b4683"],"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":"2026-09-08T21:33:19.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-54349b470ef366855336c7d2b98b4683"}],"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-54349b470ef366855336c7d2b98b4683","url":"https://github.com/advisories/GHSA-2x7j-588g-ccc2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-2x7j-588g-ccc2","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T22:54:12.705Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-54349b470ef366855336c7d2b98b4683"],"technology":"nodemailer","known_exclusions":[],"conditions_summary":"### Summary\n\nNodemailer's address parser (`lib/addressparser/index.js`) parses a list of comma‑separated addresses in **quadratic time — O(n²)** in the number of addresses. A single crafted address string (e.g. a `To`, `Cc`, `Bcc`, `From`, or `Reply‑To` value, or any value passed to the exported `addressparser`) therefore consumes CPU proportional to the **square** of its length and blocks Node's single‑threaded event loop for the entire duration, denying service to every other request in the process.\n\nThis requires **no special application configuration and no cooperating receiver** — it is entirely inside the parser and triggers on the library's default code path. A ~1.5 MB address value freezes the process for ~25–30 seconds of 100% CPU; the cost grows with the square of the input, so a few‑MB value stalls the server for minutes. It is a distinct issue from the recursion DoS fixed as CVE‑2025‑14874 (that path is guarded by a nesting‑depth cap; this one is a flat, comma‑separated list with no such limit).\n\n### Details\n\n`addressparser` tokenizes the input, splits it into per‑address token groups, and then accumulates the parsed results in a loop (`lib/addressparser/index.js`, ~lin","public_affected_ranges":["< 9.1.0"]}],"null_published_at":"2026-11-02T10:00:37.217Z","source_updated_at":"2026-09-08T21:33:19.000Z","source_disclosed_at":"2026-09-08T21:33:17.000Z","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":"2026-11-01T22:54:12.705Z"}],"next_cursor":null,"snapshot_revision":"42594"}