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High

Klue OAuth Supply Chain Attack Exposes Salesforce CRM Data

Klue, a market intelligence platform, experienced a supply chain breach where attackers used compromised legacy credentials to access its integration environment and obtain OAuth tokens.

Key points

  • Attackers used compromised legacy credentials to access Klue's integration environment.
  • OAuth tokens connected to customer platforms were obtained.
  • Stolen tokens were used to access connected Salesforce environments via the Klue Battlecards app.

Connected intelligence

Signal brief

Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.

02

Likely method

Confidentiality impact

Threat source not confirmed

03

Potential impact

Potential data exposure

Confidentiality

Published
Jun 17, 2026
Updated
Jul 1, 2026
Confidence
High
Evidence
18 sources

Structured assessment

Signal analysis

This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.

Threat source

Threat source not confirmed

Watch exposure paths that could affect data, operations or third-party trust.

Business impact

Potential data exposure
Impact area
Confidentiality
Likely asset
User or customer data

Mentioned entities

KlueData DisclosureKlue OAuth Supply Chain AttackOAuthTheseSalesforceCRMKlue BattlecardsKlueAttackers

Quick context

Questions about this signal

What happened in this signal?

Klue, a market intelligence platform, experienced a supply chain breach where attackers used compromised legacy credentials to access its integration environment and obtain OAuth tokens. These tokens were then used to access connected Salesforce environments, leading to the exfiltration of CRM data. Salesforce disabled the Klue Battlecards integration on June 17, 2026, and Klue revoked affected credentials, removed unauthorized code, and disabled impacted integrations. The attack unfolded between June 11 and June 12, 2026, but the impact on customer Salesforce environments was identified and reported by various victims on or around June 17, 2026.

When was this signal reported?

Shadow Tier lists Jun 17, 2026 as the signal date.

Which organization is connected to this signal?

Klue is the organization connected to this public signal.

Explore Klue