HackingHealthcareHealthcareStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)PHIPIIHealth (basic)MediumContained

CommonSpirit Health

bd_4825e4a7e8b8ec91 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 25, 2024

Filed

Feb 25, 2026

To disclose

15 months

Affected

19,027state residents only

Confidence

70%

Full breach record for CommonSpirit Health →3 incidents on file

CommonSpirit Health reported a data breach impacting 19,027 Washington residents. The breach originated from a third-party vendor, Pinnacle Holdings, LTD, which experienced unauthorized access between Nov 11 and Nov 25, 2024. Pinnacle copied personal information including names. CommonSpirit was notified in Feb 2026. Affected individuals are offered credit monitoring.

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Washington clock✗ WA AG >90d15 months discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 14 days

discovery → filing · 15 months / 457 days

Nov 11, 2024

Begins

Nov 25, 2024

Discovered

Feb 25, 2026

Filed

vs. sector median

+54 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed19,027 affectedView incident

Name: Northgauge Healthcare Advisors
norm: northgauge healthcare advisors

Name: CommonSpirit Health
norm: commonspirit health
Industry: Healthcarellm

Discovered: Nov 25, 2024
Breach occurred: Nov 11, 2024 – Nov 25, 2024
Undetected for: 14 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 19,027state-resident count only
Data types: PIIIdentity (basic)
Data elements: NameDate of birthMedical information
WA-stated cause: Unauthorized Access
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified Washington State Office of the Attorney General
Initial access: supply_chain

During the incident: Pinnacle immediately isolated its network
Implemented additional security measures
Engaged a third-party vendor to review the incident
Reported this incident to law enforcement
Changes made: Offering free credit monitoring and identity protection services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 months(457 days from discovery to filing)
Compliance flags: WA AG >90d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA36806.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 25, 2026
Raw hash: f9854f049cb2a22b016d5e4c27cb8e87d3f224cf0a4b805653cf8cfa49a1d953

Reporting entityNorthgauge Healthcare Advisors

Victim entityCommonSpirit Health

Incidentdiscovered Nov 25, 2024

Stated responsePinnacle immediately isolated its network

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com