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Instructure disclosed a major breach of its Canvas learning management system after the ShinyHunters group allegedly exploited a vulnerability in the platform’s Free-For-Teacher account program on April 30, 2026. The attackers claimed to have stolen data on 275 million individuals, including student, faculty, and staff information and private messages between students and teachers, with reports estimating about 3.65 TB of exfiltrated data. The incident was reported to affect thousands of institutions worldwide, with cited impact ranging from 8,809 to roughly 15,000 schools and organizations across the U.S., Europe, and the U.K.
After Instructure initially chose to patch systems rather than negotiate, ShinyHunters escalated the campaign by defacing Canvas login portals and disrupting final examinations at multiple universities when a ransom deadline approached. Instructure later suspended the Canvas portal during the fallout, and subsequent reporting said the company paid a ransom after receiving digital confirmation that the stolen data had been destroyed and that customers would not face further extortion. The operation was characterized as a pay-or-leak extortion campaign that abused account access, application-layer weaknesses, and platform or API functionality rather than deploying malware or encrypting systems.
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6 events from the most recent confirmed update back to the earliest known activity.
In September 2025, ShinyHunters reportedly breached Instructure’s Salesforce business systems through social engineering. The source notes no public confirmation that this earlier intrusion directly enabled the later Canvas compromise.
On 2026-05-12, it was reported that Instructure paid a ransom and said it received digital confirmation that the stolen data had been destroyed. The company also said customers would not be extorted.
On 2026-05-07, Instructure suspended the Canvas portal as the incident disrupted some schools’ final exams. This was reported alongside the widening operational impact of the breach.
On 2026-05-07, ShinyHunters escalated the campaign by defacing Canvas login portals across affected institutions and setting a ransom deadline of 2026-05-12. The disruption affected final examinations at multiple universities.
On 2026-05-01, Instructure confirmed a major data breach affecting its Canvas learning management system. Reporting said the incident had broad impact across institutions in the U.K., Europe, and the U.S.
On 2026-04-30, ShinyHunters exploited a vulnerability in Instructure’s Free-For-Teacher account program to gain unauthorized access to Canvas. The group allegedly stole about 275 million records and exfiltrated roughly 3.65 TB of data affecting thousands of institutions.
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ShinyHunters defaced **Canvas** login portals used by hundreds of colleges and universities after claiming a second compromise of Instructure, the education technology company behind the platform. The attackers displayed ransom messages on school login pages and in the Canvas app, threatening to leak stolen student and staff data unless Instructure entered negotiations by **May 12**. Reports said roughly **330 institutions** saw the defacement, which was linked to an injected HTML file and forced Instructure to take parts of Canvas offline while investigating. The disruption hit during a critical academic period, causing login failures, coursework interruptions, and warnings from universities about phishing and delayed assignments. The defacement followed Instructure’s earlier disclosure that attackers had stolen data tied to thousands of schools using Canvas. ShinyHunters claimed the haul included hundreds of millions of records from nearly **9,000 schools and education platforms**, including user records, private messages, and enrollment data obtained through Canvas export features and APIs. Instructure said stolen information included certain identifying data and user messages, but that it found no evidence of exposure of passwords, dates of birth, government identifiers, or financial information. Subsequent reporting said the intrusion was tied to an issue involving **Free-for-Teacher** accounts, those accounts were temporarily shut down, affected organizations were notified, and Instructure later said it paid the extortionists, received the data back, and obtained confirmation that the stolen files were destroyed.
Jun 29, 2026
Instructure, the company behind the Canvas learning management system, disclosed that a criminal threat actor breached its environment and stole user data from affected educational institutions. The company said the exposed information included **names, email addresses, student ID numbers, course and enrollment details, and messages between users**, while it found no evidence that passwords, dates of birth, government identifiers, financial information, course content, or student submissions were compromised. Reporting tied the intrusion to the **ShinyHunters** extortion group, which claimed far broader impact—up to **3.65 TB** of data and roughly **275 million records** across nearly **9,000 schools**—though those figures were not independently verified. Instructure said the attackers exploited flaws in its **Free-for-Teacher** environment, brought in outside forensic experts, notified law enforcement, revoked privileged credentials and access tokens, rotated keys, patched systems, and required some customers to reauthorize API access. The incident escalated when attackers allegedly reused the same access path to deface Canvas login portals with ransom messages, prompting Instructure to temporarily take Canvas offline and suspend Free-for-Teacher accounts while it contained the activity. The outage disrupted universities and schools across the U.S., Canada, Australia, Europe, and Asia during final exams, forcing some institutions to postpone tests, extend deadlines, or block access as a precaution. Instructure later said it reached an agreement with the threat actor under which the stolen data was returned and deletion was purportedly confirmed, but the company acknowledged there is no guarantee criminals actually destroyed their copies. The breach has since triggered warnings about follow-on phishing and impersonation campaigns, lawsuits, and scrutiny from the **U.S. House Homeland Security Committee** over how the same platform was compromised twice in quick succession.
Jun 29, 2026
A cyberattack against Instructure’s **Canvas** platform disrupted universities and K-12 schools across the United States, with major California institutions including UC, CSU, USC, Stanford, and community colleges reporting outages and academic disruption during finals. Ransom notes attributed to **ShinyHunters** appeared on some school homepages, and the FBI said it was assisting victims in multiple states while warning students and staff not to engage with extortionists or scammers. Schools extended deadlines, changed exam schedules, and shifted to alternate communication channels as Canvas services were restored. Instructure said an unauthorized actor exploited a vulnerability tied to support tickets in its **Free for Teacher** environment, which the company temporarily disabled while conducting a broader security review. The company later confirmed unauthorized access to part of its environment and said exposed data could include usernames, email addresses, course names, enrollment information, student ID numbers, and user messages, while passwords, dates of birth, government identifiers, financial data, course content, submissions, and credentials were not compromised. The incident renewed scrutiny of centralized education technology providers after earlier education-sector extortion cases, including reports that **PowerSchool** paid a ransom following claims that data on **62 million students** had been stolen.
Jun 29, 2026