One linked filing — more sources may join as they report · filed May 1, 2026. View entity profile → Other incidents for this victim →
incident inc_d4cf60afbcad4f56 · merge_method deterministic
Not recorded for this incident
Discovery variance · Leak precedence · Materiality delta · SEC filing delay · Filing span — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
Identity (basic) · PII
MA
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Pittsfield Public Schools notified the Massachusetts AG of a cybersecurity incident involving the Canvas learning management system (Instructure). The breach potentially exposed student names, email addresses, student ID numbers, and messages. No passwords, SSNs, or financial data were accessed. Instructure revoked compromised credentials, rotated keys, and restricted account creation. Services are back online.
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.