HackingEducationEducationStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCredentialsPIILowActive

Chaffey Joint Union High School District

bd_2ac482e69f007570 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

May 8, 2026

To disclose

—

Affected

Not disclosed

Confidence

67%

Full breach record for Chaffey Joint Union High School District →

Chaffey Joint Union High School District notified the California AG of a cybersecurity incident involving its third-party vendor, Instructure (Canvas). The breach potentially exposed parent/guardian credentials and personally identifiable information. The District disabled data sharing with Canvas and initiated active monitoring. Parents were advised to reset their Canvas passwords.

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Incident timeline

May 1, 2026

Begins

May 8, 2026

Filed

Part of Instructure, Inc. supply-chain incident (2026) — a supply-chain cascade affecting multiple organizations.View cascade →

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: Chaffey Joint Union High School District
norm: chaffey joint union high school district
Domain: cjuhsd.net

Name: Chaffey Joint Union High School District
norm: chaffey joint union high school district
Domain: cjuhsd.net
Industry: Educationllm

Discovered: —
Breach occurred: May 1, 2026
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: CredentialsPII
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: External
Third party: via Instructure (Canvas)
Initial access: supply_chain

During the incident: Temporarily disabled ongoing data sharing between Canvas and our student information system
Initiated active monitoring of local Canvas activity and of further communications from Instructure
Changes made: Recommended parents and guardians reset the password for their Canvas parent/guardian accounts
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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://oag.ca.gov/ecrime/databreach/reports/sb24-623157
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 8, 2026
Raw hash: 892dd9f0cacda0551929ccf846f63f1f4ac756f2ec8bafb5ac6ec1e1b940a2f6

Reporting entityChaffey Joint Union High School District

Victim entityChaffey Joint Union High School District

IncidentThird-Party / Supply Chain

Stated responseTemporarily disabled ongoing data sharing between Canvas and our student information system

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov