HackingTechnologyInformationStolen CredentialsHijackingData ExfiltratedCustomer Data InvolvedDelayed DiscoveryPIIIdentity (basic)MetadataAuthenticationLowResolved

Resend

bd_9cdb48493d2ce692 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jan 9, 2024

Filed

Jan 11, 2024

To disclose

2 days

Affected

Not disclosed

Confidence

64%

Resend disclosed that attackers accessed customer data including emails sent, domains, API keys (encrypted), logs, and contacts after discovering an exposed database API key as an environment variable on the client-side of the Resend Dashboard. The actual content of emails was not accessed. The incident occurred between December 30, 2023, and January 9, 2024. Resend rotated keys, enforced MFA, and engaged Oneleet for investigation.

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California clockDiscovered Jan 9, 2024 → Notified Jan 10, 20240d ✓ CA 60-day OK2 days discovery → filing

Incident timeline

undetected · 9 days

discovery → filing · 2 days

Dec 30, 2023

Begins

Jan 9, 2024

Discovered

Jan 11, 2024

Filed

vs. sector median

18 wks faster

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

Name: PLUS
norm: plus
Domain: plusweb.org

Name: Resend
norm: resend
Domain: plusweb.org
Industry: Technologyllm

Discovered: Jan 9, 2024
Breach occurred: Dec 30, 2023 – Jan 9, 2024
Undetected for: 9 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 10, 2024
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)MetadataAuthentication
Attack vector: Misconfiguration
MITRE ATT&CK: T1078 Valid AccountsT1190 Exploit Public-Facing Application
Threat actor: External
Initial access: valid_credentials

During the incident: Closed the access and rotated all database keys
Partnering with third-party cybersecurity company, Oneleet, to conduct an exhaustive investigation
Removed database API environment variable from the client-side of the Resend Dashboard
Rotated database API access keys
Enforced MFA across all systems touching the database
Conducted org-wide password reset across all systems touching the database
Changes made: Improving monitoring and alerting for database API access
Partnering with a third-party cybersecurity company, Oneleet, to conduct an exhaustive investigation
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 2 days(2 days from discovery to filing)
Compliance flags: CA 60-day OK · 0d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Jan 9, 2024
→ Notified: Jan 10, 2024
0d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Jan 9, 2024 → Notified: Jan 10, 2024	0d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

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/sb24-579226
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 11, 2024
Raw hash: 39379dc0abd6fd9f91bea34338a74ae4cf8e79a1fb2439e6dcc820b43a620550

Reporting entityPLUS

Victim entityResend

Incidentdiscovered Jan 9, 2024

Stated responseClosed the access and rotated all database keys

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov