# When a vendor's breach becomes yours: lessons from the Klue incident

DevFeed: [When a vendor's breach becomes yours: lessons from the Klue incident](<https://devfeed.tech/articles/when-a-vendor-s-breach-becomes-yours-lessons-from-the-klue-incident-8246.md>)

Original publisher: [Read original article](<https://snyk.io/blog/when-a-vendors-breach-becomes-yours-lessons-from-the-klue-incident/>)

Author: Anthony Larkin

Published: 2026-06-23T03:00:00Z

Content type: article

Language: en

Sources: [Blog RSS Feed | Snyk](<https://devfeed.tech/sources/blog-rss-feed-snyk.md>)

Topics: [incident](<https://devfeed.tech/topics/incident.md>), [Software as a service](<https://devfeed.tech/topics/saas.md>), [Security](<https://devfeed.tech/topics/security.md>), [OAuth](<https://devfeed.tech/topics/oauth.md>), [data](<https://devfeed.tech/topics/data.md>), [Back end](<https://devfeed.tech/topics/backend.md>)

Tags: [backend](<https://devfeed.tech/tags/backend.md>), [blog](<https://devfeed.tech/tags/blog.md>), [breach](<https://devfeed.tech/tags/breach.md>), [crm](<https://devfeed.tech/tags/crm.md>), [customer](<https://devfeed.tech/tags/customer.md>), [data](<https://devfeed.tech/tags/data.md>), [executive](<https://devfeed.tech/tags/executive.md>), [incident](<https://devfeed.tech/tags/incident.md>), [oauth](<https://devfeed.tech/tags/oauth.md>), [pmm](<https://devfeed.tech/tags/pmm.md>), [saas](<https://devfeed.tech/tags/saas.md>), [salesforce](<https://devfeed.tech/tags/salesforce.md>), [secrets](<https://devfeed.tech/tags/secrets.md>), [security](<https://devfeed.tech/tags/security.md>), [supply-chain-security](<https://devfeed.tech/tags/supply-chain-security.md>), [tech](<https://devfeed.tech/tags/tech.md>), [tokens](<https://devfeed.tech/tags/tokens.md>), [vulnerability-insights](<https://devfeed.tech/tags/vulnerability-insights.md>)

## AI overview

The article examines how a forgotten Klue credential enabled attackers to compromise the vendor's backend, harvest OAuth tokens, access connected customer Salesforce environments, and exfiltrate CRM data. It presents the incident as an example of how a SaaS breach can cascade across downstream customers.

## Source excerpt

A forgotten credential at vendor Klue let attackers reach customers' Salesforce data. How modern SaaS breaches cascade, and the keys you should audit.