BreachScout BreachScout Breach Records

Regulator-posted notice

Breach notice filed by MidFirst Bank (August 2023)

Organization named: MidFirst Bank Provisional: identity as filed, not yet matched to the directory

What the sources say

Washington Attorney General data breach notifications Primary notice

Posted on the Washington Attorney General data breach notifications with a submission date of Aug. 4, 2023.

Organization as reported
MidFirst Bank
Information types as reported
Name; Social Security Number; Financial & Banking Information; Full Date of Birth
Incident dates as reported
May 27, 2023
Submission date
Aug. 4, 2023
Observed by BreachRecords
2026-10-19 04:56 UTC (revision 25879, page:15:row:38)
Archived copy
Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

Washington data breach notifications dataset (data.wa.gov sb4j-ca4h) Duplicate filing

Posted on the Washington data breach notifications dataset with a submission date of Aug. 4, 2023.

Organization as reported
MidFirst Bank, OK
Entity type as reported
Finance
Category as reported
Cyberattack; Other
Incident dates as reported
May 27, 2023 to May 31, 2023
Discovery date as reported
June 13, 2023
Submission date
Aug. 4, 2023
Observed by BreachRecords
2026-11-01 20:03 UTC (revision 63232, row:948)
Extraction
Parsed from a document; extraction confidence 0.85
Archived copy
Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

California Attorney General data security breach list Duplicate filing

Posted on the California Attorney General data security breach list with a submission date of Aug. 21, 2023.

Organization as reported
MidFirst Bank
Submission date
Aug. 21, 2023
Observed by BreachRecords
2026-10-19 05:02 UTC (revision 50964, nid:572155)
Archived copy
Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

Figures, per source

  • 6,097 individuals affected (residents of the reporting state), according to the Washington Attorney General data breach notifications, source date Aug. 4, 2023, revision observed 2026-10-19.
  • 6,097 individuals affected (residents of the reporting state), according to the Washington data breach notifications dataset, source date Aug. 4, 2023, revision observed 2026-11-01.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

  • Submission date (Washington Attorney General data breach notifications)
  • Submission date (Washington data breach notifications dataset)
  • Submission date (California Attorney General data security breach list)
  • Observed by BreachRecords (revision 25879)
  • Observed by BreachRecords (revision 50964)
  • Observed by BreachRecords (revision 63232)
  • Approved by a reviewer

Organizations linked by a reviewer

  • MidFirst Bank Named as the filer Provisional: identity as filed, not yet matched to the directory Linked 2026-11-04, method manual.

Archived evidence

  • 264d45f73831ec8fc298837002b836f792a7cfd7f3d6b4d2128484a23223c042
    text/csv, 453,656 bytes, retrieved from Washington data breach notifications dataset, 2026-11-01 20:03 UTC. Archived privately · Provenance · Source page
  • 681db5a1d9737f9beb89c5014a7261595d10c34a77faaa49ac667e9be4110e16
    text/html, 153,878 bytes, retrieved from Washington Attorney General data breach notifications, 2026-10-19 04:56 UTC. Archived privately · Provenance · Source page
  • 88a643a02a380a38e8d4e354650ae4ef5fecfa5b0bc2f1c6008c0e0f989f6e0d
    text/html, 88,103 bytes, retrieved from California Attorney General data security breach list, 2026-10-19 05:02 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

Request a correction

A record that disagrees with its source, names the wrong organization or duplicates another is corrected after review. This form is about Breach notice filed by MidFirst Bank (August 2023). We acknowledge every request within two business days. We reply by email.

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