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. 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.
Signal context
First seen: Jun 17, 2026
Last updated: Jul 1, 2026
Status: Public signal
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.
Signal analysis
BetaThis 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.
Sector: Information
Likely country: Location not provided
Watch internet-facing systems, credential abuse and exploit activity.
- Source type: outside the affected organization
Impact area: Confidentiality
Likely asset: User or customer data
- 23 signals in the same sector
- 88 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Klue OAuth breach victim list grows as Icarus hackers claim attack - Bleeping Computerhttps://www.bleepingcomputer.com/news/security/klue-oauth-breach-victim-list-grows-as-icarus-hackers-claim-attack/Public source from bleepingcomputer.com.
Cybersecurity Firms Impacted by Klue Supply Chain Attack - SecurityWeekhttps://www.securityweek.com/cybersecurity-firms-impacted-by-klue-supply-chain-attack/Public source from securityweek.com.
Scope of Salesforce Attacks Expands as Icarus Leaks Data - Cyber Recapshttps://cyberrecaps.com/news/cybersecurity-news-june-24-2026/Public source from cyberrecaps.com.
LastPass hit by new data breach - 4 steps you should take now | ZDNEThttps://www.zdnet.com/article/lastpass-new-data-breach-2026-steps-to-take-now/Public source from zdnet.com.
Top 5 Cybersecurity News Stories June 26, 2026 - DIESEChttps://diesec.com/top-5-cybersecurity-news-stories-june-26-2026/Public source from diesec.com.
Salesforce Disables Klue App Integration After OAuth Token Abuse Exposes Customer Datahttps://thehackernews.com/2026/06/salesforce-disables-klue-app.htmlPublic source from thehackernews.com.
Klue Supply Chain Breach Exposes OAuth Tokens and Salesforce Data in Multi-Stage Cybersecurity Incident (June 2026) - Rescanahttps://www.rescana.com/post/klue-supply-chain-breach-exposes-oauth-tokens-and-salesforce-data-in-multi-stage-cybersecurity-incident-june-2026Public source from rescana.com.
Cybersecurity Daily Briefing: June 22, 2026https://techmaniacs.com/cybersecurity-daily-briefing-june-22-2026/Public source from techmaniacs.com.
NEWS ROUNDUP - 22nd June 2026https://digitalforensicsmagazine.com/news-roundup-22nd-june-2026/Public source from digitalforensicsmagazine.com.
Recorded Future (2026-06-11) Cyber-Attack Hack Breach - The Cyber Security Incident Database (CSIDB)https://www.csidb.net/csidb/incidents/a3694fd2-8468-45d3-9044-340ea5ca3d90/Public source from csidb.net.
Klue-Salesforce OAuth Token Breach Hits Multiple Companies - Bright Defensehttps://www.brightdefense.com/resources/recent-data-breaches/Public source from brightdefense.com.
Klue OAuth Supply-Chain Breach Exposed Salesforce Data Across Multiple Customershttps://www.mallory.ai/stories/019edb44-57c2-756b-bec2-0cba596e0070Public source from mallory.ai.
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