AccidentalHealthcareTechnologyHealthcareMisconfigurationCustomer Data InvolvedGovernment IDPHIPIIMediumContained

FIRSTSOURCE HEALTH PLANS AND HEALTHCARE SERVICES, LLC

bd_a689a702e0a22d4e · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 18, 2026

Filed

Jun 16, 2026

To disclose

29 days

Affected

Not disclosed

Confidence

66%

Full breach record for FIRSTSOURCE HEALTH PLANS AND HEALTHCARE SERVICES, LLC →2 incidents on file

Firstsource Healthplans and Healthcare Services, LLC, a healthcare technology service provider, disclosed a programming error on its platform that potentially exposed protected health information and standalone Social Security numbers. The vulnerability was active from July 16, 2025, to January 15, 2026, and was discovered on May 18, 2026. Firstsource engaged forensic investigators, patched the vulnerability, and offered credit monitoring. No evidence of misuse was found.

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Incident timeline

undetected · 306 days

discovery → filing · 29 days

Jul 16, 2025

Begins

May 18, 2026

Discovered

Jun 16, 2026

Filed

vs. sector median

8 wks faster

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

Name: FIRSTSOURCE HEALTH PLANS AND HEALTHCARE SERVICES, LLC
norm: firstsource health plans and healthcare

Name: FIRSTSOURCE HEALTH PLANS AND HEALTHCARE SERVICES, LLC
norm: firstsource health plans and healthcare
Industry: HealthcarellmTechnologyllm

Discovered: May 18, 2026
Breach occurred: Jul 16, 2025 – Jan 15, 2026
Undetected for: 306 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Government IDIdentity (basic)
Data elements: Social Security number
Attack vector: Misconfiguration
MITRE ATT&CK: T1562 Impair Defenses
Threat actor: External

During the incident: Disabled the setting that allowed this information to be accessed
Added additional protections to the related system
Strengthened access controls consistent with security best practices
Updated the system to better control how files and information can be accessed
Added additional safeguards to block attempts to reach information through unauthorized paths
Changed the way the application handles file access so it can only occur through approved processes
Strengthened checks on the system to help ensure only authorized users can make requests
Improved security for system connections and application features to better protect against unauthorized access
Enhanced session controls, including automatic expiration and sign-out protections
Added stronger checks throughout the application to help prevent unauthorized access to information
Changed passwords, security keys, and other credentials connected to the affected application
Strengthened protections for sensitive information, including when it is stored and when it is transmitted
Added stronger user verification steps for certain file access functions
Engaged an independent forensic firm to review the security of the platform
Changes made: Updated the system to better control how files and information can be accessed
Added additional safeguards to block attempts to reach information through unauthorized paths
Changed the way the application handles file access so it can only occur through approved processes
Strengthened checks on the system to help ensure only authorized users can make requests
Improved security for system connections and application features to better protect against unauthorized access
Enhanced session controls, including automatic expiration and sign-out protections
Added stronger checks throughout the application to help prevent unauthorized access to information
Changed passwords, security keys, and other credentials connected to the affected application
Strengthened protections for sensitive information, including when it is stored and when it is transmitted
Added stronger user verification steps for certain file access functions
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 29 days(29 days from discovery to filing)
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://attorneygeneral.delaware.gov/wp-content/uploads/sites/50/2026/07/Sample-Notice-2.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 16, 2026
Raw hash: eeeefcc467dd15738545eb371ed905b22be2940c776e467b1d57695198cc6f84

Reporting entityFIRSTSOURCE HEALTH PLANS AND HEALTHCARE SERVICES, LLC

Victim entityFIRSTSOURCE HEALTH PLANS AND HEALTHCARE SERVICES, LLC

Incidentdiscovered May 18, 2026

Stated responseDisabled the setting that allowed this information to be accessed

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceattorneygeneral.delaware.gov