# AI incidents at banks in 2026

Source: https://www.bankingnewsai.com/ai-incidents/year/2026
Last updated: Oct 21, 2026

## How many AI incidents did banks have in 2026?

As of Oct 21, 2026, the register holds 15 publicly reported AI incidents at banks and fintechs dated 2026. 8 of the 15 records involve systems the institution or a regulator described as AI; 1 is an automated system not described as AI, and 6 are machine-learning systems not labelled AI on the record. Countries: United States (4), United Kingdom (3), Italy (2). Average severity 2.3 on a 1–5 scale. Status: 5 reported, 6 confirmed by the institution, 1 regulator finding, 2 court filing, 1 disputed. The most recent is "U.S. Bank customers sue Pegasystems alleging its Voice AI secretly analysed their customer-service calls" (Oct 2, 2026).

| Date | Institution | Incident | AI? | Role | Category | Severity | Status |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Oct 2, 2026 | U.S. Bank National Association (named in the complaint, not a defendant) | [U.S. Bank customers sue Pegasystems alleging its Voice AI secretly analysed their customer-service calls](https://www.bankingnewsai.com/ai-incidents/us-bancorp-2026-pega-voice-ai-wiretap-suit) | AI (stated) | Governance finding | Litigation | 2/5 | Court filing |
| Sep 29, 2026 | Shinhan Bank, KB Kookmin Bank, Hana Bank, BNK Busan Bank and Yegaram Savings Bank | [AI-agent-assisted intrusions breach Shinhan, KB Kookmin, Hana and 13 other Korean financial firms](https://www.bankingnewsai.com/ai-incidents/korean-banks-2026-artex-ai-agent-intrusions) | ML (inferred) | AI used against the institution | Other | 5/5 | Reported |
| Sep 17, 2026 | Libra Internet Bank | [Libra Internet Bank's OpenAI-based assistant 'Lia' calls a customer an 'idiot'](https://www.bankingnewsai.com/ai-incidents/libra-internet-bank-2026-lia-chatbot-insult) | AI (stated) | Institution's own AI | Chatbot failure | 1/5 | Confirmed by the institution |
| Jul 3, 2026 | NatWest Group | [Deepfake image of NatWest CEO Paul Thwaite spread on X as scam bait](https://www.bankingnewsai.com/ai-incidents/natwest-2026-ceo-deepfake-image-scam) | ML (inferred) | AI used against the institution | Brand impersonation | 1/5 | Confirmed by the institution |
| Jun 22, 2026 | Deutsche Bank National Trust Company (as trustee) | [D.C. Court of Appeals strikes Deutsche Bank National Trust brief citing four AI-invented cases](https://www.bankingnewsai.com/ai-incidents/deutsche-bank-us-2026-ai-hallucinated-brief-struck) | AI (stated) | Governance finding | Litigation | 2/5 | Court filing |
| Jun 3, 2026 | Monzo and Barclays | [AI-generated 'Monzo Slots' and 'Barclays Slots' casino ads impersonate UK banks on social media](https://www.bankingnewsai.com/ai-incidents/monzo-2026-ai-fake-casino-ads) | AI (stated) | AI used against the institution | Brand impersonation | 1/5 | Confirmed by the institution |
| May 13, 2026 | Klarna and Pagaya Technologies | [Pagaya sues Klarna, alleging it 'distilled' and misappropriated its AI underwriting model](https://www.bankingnewsai.com/ai-incidents/klarna-2026-pagaya-underwriting-model-suit) | AI (stated) | Governance finding | Litigation | 2/5 | Disputed |
| May 5, 2026 | CB Financial Services, Inc. (Community Bank, Carmichaels, PA) | [Community Bank files 8-K after an employee put customer SSNs into an unauthorized AI app](https://www.bankingnewsai.com/ai-incidents/cb-financial-2026-shadow-ai-customer-data) | AI (stated) | Governance finding | Data leak to an LLM | 3/5 | Confirmed by the institution |
| May 4, 2026 | Bankr (Bankrbot) and xAI (Grok) | [Morse-code prompt injection via Grok makes AI wallet agent Bankrbot send about $150,000-200,000 in tokens](https://www.bankingnewsai.com/ai-incidents/bankr-2026-grok-morse-prompt-injection) | AI (stated) | Institution's own AI | Prompt injection | 2/5 | Reported |
| May 2026 | Lloyds Bank | [Lloyds refunds estate of 82-year-old customer lured by an AI Farage deepfake investment scam](https://www.bankingnewsai.com/ai-incidents/lloyds-2026-farage-deepfake-scam-refund) | ML (inferred) | AI used against the institution | Deepfake fraud | 2/5 | Confirmed by the institution |
| Apr 2026 | Westpac New Zealand and Kiwibank | [Deepfakes of Westpac NZ and Kiwibank chief executives used in Facebook investment-scam ads](https://www.bankingnewsai.com/ai-incidents/westpac-nz-2026-bank-ceo-deepfake-scam-ads) | AI (stated) | AI used against the institution | Brand impersonation | 1/5 | Confirmed by the institution |
| Mar 12, 2026 | Intesa Sanpaolo S.p.A. and Isybank S.p.A. | [Italy's privacy regulator fines Intesa Sanpaolo €17.6m for profiling 2.4m customers to move them to Isybank](https://www.bankingnewsai.com/ai-incidents/intesa-sanpaolo-2026-garante-isybank-profiling) | Automation, not AI | Governance finding | Regulatory finding | 3/5 | Regulator finding |
| Feb 26, 2026 | Commonwealth Bank of Australia | [Commonwealth Bank refers about A$1bn of suspect home loans, some reportedly AI-forged, to police](https://www.bankingnewsai.com/ai-incidents/commonwealth-bank-2026-ai-forged-loan-documents) | ML (inferred) | AI used against the institution | Other | 3/5 | Reported |
| Feb 2026 | Fideuram - Intesa Sanpaolo Private Banking and Intesa Sanpaolo | [Fideuram wires €95m after fake Intesa CEO messages and an AI-cloned lawyer's voice](https://www.bankingnewsai.com/ai-incidents/fideuram-2026-voice-clone-ceo-fraud) | ML (inferred) | AI used against the institution | Voice clone | 4/5 | Reported |
| Jan 2026 | Klarna | [Klarna processed payments for nine months for shops advertising with celebrity deepfakes](https://www.bankingnewsai.com/ai-incidents/klarna-2026-deepfake-pill-ads-payments) | ML (inferred) | AI used against the institution | Deepfake fraud | 2/5 | Reported |

The register: https://www.bankingnewsai.com/ai-incidents

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Part of [BankingNewsAI](https://www.bankingnewsai.com/) — the register of AI incidents at banks: https://www.bankingnewsai.com/ai-incidents. Markdown versions of every reference page: append `.md` to the page URL; index at https://www.bankingnewsai.com/llms.txt.