AccidentalHealthcareHealthcareMisdeliveryEmployee Data InvolvedIdentity (basic)Government IDHealth (basic)MediumResolved

MASS GENERAL BRIGHAM INCORPORATED

bd_ce02caacf3eac65b · schema v1 · pii pii-v2

Severity

Medium

Discovered

Jul 6, 2026

Filed

Sep 1, 2026

To disclose

—

Affected

1state residents only

Confidence

69%

Full breach record for MASS GENERAL BRIGHAM INCORPORATED →15 incidents on file

Mass General Brigham inadvertently sent an email attachment containing personal information (name, email, DOB, SSN, NPI) to three onboarding employees on July 6, 2026. The recipients deleted the data. Affected individuals are offered 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

Jul 6, 2026

Begins

Jul 6, 2026

Discovered

Sep 1, 2026

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: MASS GENERAL BRIGHAM INCORPORATED
norm: mass general brigham
Domain: massgeneralbrigham.org

Name: MASS GENERAL BRIGHAM INCORPORATED
norm: mass general brigham
Domain: massgeneralbrigham.org
Industry: Healthcarellm

Discovered: Jul 6, 2026
Breach occurred: Jul 6, 2026
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 26, 2026
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDHealth (basic)
Attack vector: Unknown
Threat actor: Internal

During the incident: Confirmed that the email and attachment were promptly and permanently deleted by recipients
Offering 24 months of complimentary credit monitoring and identity protection services through Experian IdentityWorks
Changes made: Strengthen safeguards and promote training, education, and accountability across workforce
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.mass.gov/doc/2026-1572-mass-general-brigham/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 1, 2026
Raw hash: a33cbb545328ff132eca9b84b85016b680e50a905be53528b127cfc569f479c0

Reporting entityMASS GENERAL BRIGHAM INCORPORATED

Victim entityMASS GENERAL BRIGHAM INCORPORATED

Incidentdiscovered Jul 6, 2026

Stated responseConfirmed that the email and attachment were promptly and permanently deleted by recipients

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov