Social EngineeringPIIIdentity (basic)MediumContained

Carnival Corporation Ltd.

bd_b81d693843691c59 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Apr 14, 2026

Filed

May 27, 2026

To disclose

6 weeks

Affected

5,690state residents only

Linked

17 records

Confidence

68%

Full breach record for Carnival Corporation Ltd. →6 incidents on file

Carnival Corporation notified Montana residents of a cybersecurity event on May 27, 2026. Unauthorized access occurred on April 14, 2026, via social engineering targeting an employee account. The actor copied personal information, confirmed on April 22, 2026. The company engaged third-party security experts, blocked access, and offered 24 months of TransUnion credit monitoring to affected individuals.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d6 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

discovery → filing · 6 weeks / 43 days

Apr 14, 2026

Discovered

May 27, 2026

Filed

This filing is one of 17 records about the same incident.View merged incident

A leak claim by shinyhunters about this victim was first seen 38 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Washington State AGbd_06ca13775dc757a32026-05-27Verified
Nebraska State AGbd_1a1bc5215fd93cf02026-05-27Verified
Maine State AGbd_24671352cfb8e0c52026-05-27Verified
Indiana State AGbd_403cc5ab7d0963812026-05-27Verified

Show 6 more filings ↓up to 1d gap

Oregon State AGbd_6d8af3869b6bca552026-05-27Verified
California State AGbd_843aca78131302882026-05-27Verified
Texas State AGbd_104c3479219b55d22026-05-28 · +1dVerified
Massachusetts State AGbd_2fa8add804519bbe2026-05-28 · +1dVerified
Vermont State AGbd_a217ec232607f2bd2026-05-28 · +1dVerified
South Carolina State AGbd_b40f7e0268a40f142026-05-28 · +1dVerified

Showing first 10 of 16 linked disclosures.

Name: Carnival Corporation Ltd.
norm: carnival
Domain: carnivalcorp.com

Name: Carnival Corporation Ltd.
norm: carnival
Domain: carnivalcorp.com

Discovered: Apr 14, 2026
Materiality determined: —
Notification sent: May 27, 2026
Affected individuals: 5,690state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Acted swiftly to block the unauthorized activity
Began working with third party security experts to further strengthen our security and to conduct a thorough investigation
Offering you a complimentary 24-month membership to TransUnion’s credit monitoring
Changes made: Enhancing our security and monitoring controls
Advance its IT security and data privacy controls
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(43 days from discovery to filing)
Compliance flags: Leak >30d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

Washington State AGMay 27 · first

Nebraska State AGMay 27 · first

Maine State AGMay 27 · first

Indiana State AGMay 27 · first

Oregon State AGMay 27 · first

California State AGMay 27 · first

Montana State AGMay 27 · first · this page

Texas State AG+1d

Massachusetts State AG+1d

Vermont State AG+1d

South Carolina State AG+1d

Cascade drawn from the first 10 linked disclosures of 16 — the full spread may be wider.

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://dojmt.gov/wp-content/uploads/2026/09/Consumer-notification-letter-29.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 27, 2026
Raw hash: 70b7697063e38a5b402f9602665e941ea7d754cc556fa2772d894ce9c0de28ad

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityCarnival Corporation Ltd.

Victim entityCarnival Corporation Ltd.

Incidentdiscovered Apr 14, 2026

Stated responseActed swiftly to block the unauthorized activity

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancedojmt.gov