high severity November 12, 2026 · 1 min read Unverified claim — what this is

Chicago History Museum Listed by INC Ransom Ransomware Group

If you are a customer of Chicago History Museum, here’s what is being claimed, and what it would mean for you.

# CHICAGO HISTORY MUSEUM — DATA BREACH ![CHM Logo](logo_color.svg) **Organization:** Chicago History Museum (formerly Chicago Historical Society) **Location:** 1601 N Clark Street, Chicago, IL 60614 **Website:** chicagohistory.org **CEO:** Michael J. Anderson, President & CEO **Industry:** Non-profit / Cultural Institution **Breach Date:** September 2026 **Data Volume:** 4 departments + AWS cloud infrastructure, 15+ years of records **Individuals Affected:** 20,000+ --- ## WHAT HAPPENED Chicago History Museum's internal file server **and** AWS cloud infrastructure have been fully compromised.
— from INC Ransom’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

Chicago History Museum Listed by INC Ransom Ransomware Group

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unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

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Report details & sourcing

Attributed to INC Ransom · 1085 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed November 12, 2026

Last reviewed November 12, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Sources: INC Ransom leak site (via Ransomfeed)

Threat-actor tracker

INC Ransom — 1085 incidents tracked

Every breach we've attributed to INC Ransom, in one running log. See who else they've hit →

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high November 11, 2026