Data Breaches More Cybersecurity Firms Disclose Impact From Klue Hack HackerOne, Huntress, Jamf, OneTrust, Recorded Future, Snyk, and Tanium are among the affected Klue customers. By Ionut Arghire | June 22, 2026 (5:03 AM ET) Flipboard Reddit Whatsapp Whatsapp Email At least nine organizations have publicly acknowledged the impact of the supply chain attack on market intelligence platform Klue. The incident occurred on June 11-12 and affected Klue’s integration with Salesforce, resulting in data being exfiltrated from the Salesforce instances of multiple Klue customers, including several cybersecurity firms. On Friday, Klue confirmed previous security reports that the attackers used compromised legacy credentials to access its systems and compromise Salesforce integrations. “The attacker used that access to obtain OAuth tokens used to connect Klue with certain third-party platforms, including Salesforce, and subsequently accessed data within a number of connected customer environments,” Klue said. The company revoked the affected credentials and tokens, disabled the integrations across multiple services, and has been investigating the attack together with CrowdStrike and law enforcement. “Based on our investigation to date, the incident was limited to the affected third-party platforms, and there is no evidence that customer content stored within the Klue platform was impacted,” the company said. Advertisement. Scroll to continue reading. To date, at least nine Klue customers have disclosed impact from the incident, including cybersecurity firms HackerOne , Huntress , Jamf , OneTrust , Recorded Future , Snyk , and Tanium . Insurity and Sprout Social also notified their customers of the incident. All the affected companies pointed out that the intrusion was limited to the Salesforce instances and did not involve their systems, as Klue said in its incident notice. Across the board, the hackers stole business information from the affected organizations’ Salesforce CRMs, including sales account data and business contact information, such as names, email addresses, job titles, phone numbers, and business addresses. Salesforce disabled the Klue integration in the wake of the incident, and revenue intelligence platform Gong did the same on Friday, warning that the hackers exploited its Klue integration to access internal licensed user data. “We can confirm no direct impact on call recordings or customer transcripts. Examples of data accessed included user names, user business titles, and user emails,” Gong said. In its analysis of the incident, Huntress suggested that a threat actor named Icarus might have been responsible for the attack. Since then, Icarus has added Klue to its Tor-based leak site, claiming responsibility for the attack and threatening to publish the information stolen from Klue customers’ Salesforce instances. Per the threat actor’s posts, the data would be released on June 22, unless Klue and the affected organizations engage in negotiations. Related: Cybersecurity Firms Impacted by Klue Supply Chain Attack Related: Atomic Arch Supply Chain Attack Hits 1,500 AUR Packages Related: ‘SymJack’ Attack Turns AI Coding Agents Into Supply Chain Attack Delivery Systems Related: Laravel-Lang Packages Poisoned for Malware Delivery Written By Ionut Arghire Ionut Arghire is an international correspondent for SecurityWeek. Daily Briefing Newsletter Subscribe to the SecurityWeek Email Briefing for the latest cybersecurity threats, trends, and expert insights. More from Ionut Arghire Majority of Internet-Accessible REDCap Servers Outdated Dream Raises $260 Million at $3 Billion Valuation Atlassian, Splunk Patch Critical Vulnerabilities Critical Command Execution Vulnerability Patched in Cisco ISE F5 Patches Critical, High-Severity NGINX Vulnerabilities Microsoft Teams Relay Servers Abused in DragonForce Ransomware Attack Microsoft Working on Patch for ‘RoguePlanet’ Zero-Day Chrome and Firefox Updated to Patch Critical, High-Severity Vulnerabilities Latest News Texas Parks & Wildlife Data Breach Affects 3 Million Individuals French President Urges US to Share Cutting-Edge AI and Democracies to Cooperate on Regulation In Other News: Apple Patches Beats Eavesdropping Flaw, DOT Closes Delta CrowdStrike Probe, AWS Continuum CryptoBandits Malware Doubles as a Backdoor, Abuses Tor FortiBleed: 86,000 Fortinet Device Credentials Compromised Cybersecurity Firms Impacted by Klue Supply Chain Attack Cisco to Acquire WideField Security to Boost Splunk’s Agentic SOC 15,000 WordPress Websites Cleaned Up in SocGholish Botnet Takedown Trending Daily Briefing Newsletter Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts. Webinar: How Modern Breaches Bypass MFA and Evade Detection June 17, 2026 Today’s attackers are no longer breaking in — they’re logging in. Join this live webinar as we break down the modern identity attack chain and examine how recent breaches exploited weaknesses in authentication, identity verification, and access management processes. Register Webinar: Modern Exposure Validation in the AI Era June 24, 2026 AI has accelerated both sides of the fight. Adversaries are weaponizing vulnerabilities faster, while defenders are racing to ship detections and configurations. Join this live webinar as we explore how to prove your controls actually hold against new threats, map your security maturity, and unite breach simulation with automated pentesting into a single, coordinated program. Register People on the Move SolarWinds has appointed Justin Henkel as Chief Information Security Officer. J. Paul Haynes has joined Cinchy as Chief Executive Officer. Hatem Naguib has become Chief Executive Officer at Sysdig. More People On The Move Expert Insights No Exploits Required Four decades of incident response experience suggest that exploits are often the symptom, not the root cause, of today’s cybersecurity failures. (Tod Beardsley) After AI Reaches Production: 12 Ways Security Teams Can Take Control Security teams need more than visibility into AI applications, they need a repeatable framework for monitoring, investigating, and defending them in production. (Joshua Goldfarb) Everybody Is Vibe Coding But Nobody Told the Security Team AI-driven development is not something organizations can or should block. But it must be governed. (Danelle Au) The Zero-Knowledge Threat Actor and the End of Responsible Disclosure AI can help attackers generate malware, create malicious payloads, bypass simple security checks, and convert vague malicious intent into functional code. (Etay Maor) Raising the Cybersecurity Stakes: Ante up for the Agentic Era CISOs are now facing machine-speed attacks and asking, “How do I agent?” The industry must provide remediation at scale. (Nadir Izrael) Flipboard Reddit Whatsapp Whatsapp Email