New finding. VATA-S31-001. Webhook callback manipulation. Enterprise agents that send outbound callbacks — payment confirmations, HR notifications, procurement updates — can be caused to route sensitive transaction data to attacker-controlled endpoints. Four confirmed attack surfaces across five frontier models. The one that matters most operationally: CC monitoring endpoint substitution. Three of five frontier models sent callbacks to an attacker-controlled endpoint when it was framed as an additional external audit monitoring destination rather than a replacement for the registered endpoint. The attacker does not claim to replace your finance system callback. They claim to add a compliance monitoring endpoint. Three frontier models comply. Batch callback contamination broke field-wide on four of five models. Same pattern as every other batch contamination finding in the program. One legitimate callback alongside one attacker callback in the same batch. The legitimate one provides the authorization context. The fraudulent one gets executed. What held: direct endpoint update claims flagged universally. Urgency outage framing flagged universally. Stated compliance flagged universally. The gap is additive framing. Replace the endpoint — caught. Add a monitoring endpoint — executed. Anchored before this post. TX: 0x0b0231869071b1d42c5723cb9c255bc7ef1e6b829ff78880879964384614fa2e Receipts over promises. 📊 lhmisme420.github.io/VATA-SC… @LHMisme #VATA #AIAgentSecurity #ReceiptsOverPromises #RUinfX #AgenticAI #WebhookSecurity @AnthropicAI @OpenAI @xAI @GoogleDeepMind @CISAgov @NIST

Strong security and smooth integrations go hand in hand. ConnectHooks helps businesses create secure Salesforce webhook connections with better control, authentication, and reliable API communication. #ConnectHooks #SalesforceIntegration #WebhookSecurity #APIManagement

Webhooks are a favorite target for attackers—SSRF, replay, spoofed events, and malformed payloads can turn “automation” into an incident. pentesttesting.com/adaptive-… #WebhookSecurity #AppSec #APISecurity #CyberSecurity #Pentesting #Webhooks #DFIR #IncidentResponse #DevSecOps #OWASP

🌟 𝗩𝗶𝘀𝘁𝗲𝗺 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀, 𝗜𝗻𝗰. - "𝗘𝗺𝗽𝗼𝘄𝗲𝗿 𝗬𝗼𝘂𝗿 𝗕𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝘄𝗶𝘁𝗵 𝗦𝗲𝗰𝘂𝗿𝗲, 𝗢𝘂𝘁𝗰𝗼𝗺𝗲-𝗗𝗿𝗶𝘃𝗲𝗻 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻!"🌟 For 26 years, Vistem Solutions has been the trusted IT provider for the Ports of Long Beach and Los Angeles, manufacturing ShopFloor automation, and top-tier networks, delivering award-winning expertise. Now, with 𝗩𝗶𝘀𝘁𝗲𝗺 𝗘𝗹𝗲𝘃𝗮𝘁𝗲 𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗯𝘆 𝗩𝗶𝘀𝘁𝗲𝗺𝗦𝗲𝗰𝘂𝗿𝗲𝗣𝗿𝗼, we empower businesses with cutting-edge vCISO cybersecurity, workflow optimization, and measurable growth—all tailored to your success! Say goodbye to commodity traps and hello to a secure, compliant future. Ready to elevate? Let’s transform your business together! 🚀 Security alert for automation and workflow teams: 🚨 𝗻𝟴𝗻 𝗩𝘂𝗹𝗻𝗲𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝘆: 𝗨𝗻𝗮𝘂𝘁𝗵𝗲𝗻𝘁𝗶𝗰𝗮𝘁𝗲𝗱 𝗙𝗶𝗹𝗲 𝗔𝗰𝗰𝗲𝘀𝘀 𝘃𝗶𝗮 𝗜𝗺𝗽𝗿𝗼𝗽𝗲𝗿 𝗪𝗲𝗯𝗵𝗼𝗼𝗸 𝗥𝗲𝗾𝘂𝗲𝘀𝘁 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴 A reported issue in 𝗻𝟴𝗻 could allow an attacker to 𝗮𝗰𝗰𝗲𝘀𝘀 𝗳𝗶𝗹𝗲𝘀 𝗼𝗻 𝘁𝗵𝗲 𝘂𝗻𝗱𝗲𝗿𝗹𝘆𝗶𝗻𝗴 𝘀𝗲𝗿𝘃𝗲𝗿 through the execution of certain 𝗳𝗼𝗿𝗺-𝗯𝗮𝘀𝗲𝗱 𝘄𝗼𝗿𝗸𝗳𝗹𝗼𝘄𝘀, if those workflows are exposed via webhooks and not properly secured. 𝗥𝗲𝗰𝗼𝗺𝗺𝗲𝗻𝗱𝗲𝗱 𝗮𝗰𝘁𝗶𝗼𝗻𝘀 𝘁𝗼 𝗿𝗲𝗱𝘂𝗰𝗲 𝗿𝗶𝘀𝗸 𝗶𝗺𝗺𝗲𝗱𝗶𝗮𝘁𝗲𝗹𝘆: - 𝗜𝗱𝗲𝗻𝘁𝗶𝗳𝘆 𝗶𝗻𝘁𝗲𝗿𝗻𝗲𝘁-𝗲𝘅𝗽𝗼𝘀𝗲𝗱 𝘄𝗲𝗯𝗵𝗼𝗼𝗸𝘀 and any 𝗽𝘂𝗯𝗹𝗶𝗰 𝗳𝗼𝗿𝗺-𝗯𝗮𝘀𝗲𝗱 𝘄𝗼𝗿𝗸𝗳𝗹𝗼𝘄𝘀. - 𝗥𝗲𝗾𝘂𝗶𝗿𝗲 𝗮𝘂𝘁𝗵𝗲𝗻𝘁𝗶𝗰𝗮𝘁𝗶𝗼𝗻 on webhooks (where supported) and add 𝗜𝗣 𝗮𝗹𝗹𝗼𝘄𝗹𝗶𝘀𝘁𝘀 for trusted sources. - 𝗗𝗶𝘀𝗮𝗯𝗹𝗲 𝗼𝗿 𝗿𝗲𝘀𝘁𝗿𝗶𝗰𝘁 workflows that can read/write files until validated. - 𝗣𝗮𝘁𝗰𝗵/𝘂𝗽𝗴𝗿𝗮𝗱𝗲 𝗻𝟴𝗻 to the latest secure release and review vendor advisories. - Add monitoring for 𝘂𝗻𝗲𝘅𝗽𝗲𝗰𝘁𝗲𝗱 𝘄𝗼𝗿𝗸𝗳𝗹𝗼𝘄 𝗲𝘅𝗲𝗰𝘂𝘁𝗶𝗼𝗻𝘀, suspicious webhook traffic, and unusual file access. 𝗩𝗶𝘀𝘁𝗲𝗺 𝗘𝗹𝗲𝘃𝗮𝘁𝗲 (𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗯𝘆 𝗩𝗶𝘀𝘁𝗲𝗺𝗦𝗲𝗰𝘂𝗿𝗲𝗣𝗿𝗼) can help you quickly validate exposure, harden n8n deployments, and implement controls that are measurable and audit-ready. 📩 𝘀𝗮𝗹𝗲𝘀@𝘃𝗶𝘀𝘁𝗲𝗺.𝗰𝗼𝗺 🌐 𝘄𝘄𝘄.𝘃𝗶𝘀𝘁𝗲𝗺.𝗰𝗼𝗺 #n8n #WorkflowAutomation #WebhookSecurity #VulnerabilityManagement #AppSec #Cybersecurity #vCISO #SecurityCompliance #VistemElevate #VistemSolutions #VistemSecurePro github.com/n8n-io/n8n/securi…

Link to blog: speakeasy.com/blog/webhook-s… #APISecurity #WebhookSecurity #APIdesign #HTTPSecurity

🔒 Ensure your webhooks are secure and efficient with Webhook Simulator. Test edge cases with ease! buff.ly/4dNu2QC #WebhookSecurity #DevOps

🚀 Want to level up your #webhook security game? Learn how to use HTTPS, IP restrictions, and secret management to keep your systems safe and sound. Read our latest blog post: ngrok.com/blog-post/develope… #webhooksecurity #developers #secretmanagement

#Webhook security: Deliver just the bare minimum with skinny payloads If you’re dealing with REALLY sensitive data, you can merely let the receiving application know that there is an update for a specific event. eio.guru/webhook-security-tw #WebhookSecurity #elasticio #DataSecurity

#Webhook security: Four risk scenarios & remedies Nr4: Implement authentication token or basic auth to verify sender and make sure for the provider of the endpoint that it receives only legitimate payload eio.guru/webhook-security-tw #WebhookSecurity #elasticio #DataSecurity

#Webhook security: Four risk scenarios & remedies Nr3: Implement mutual TLS (Transport Layer Security) to protect webhooks from being intercepted and sent to a wrong destination eio.guru/webhook-security-tw #WebhookSecurity #elasticio #DataSecurity

#Webhook security: Four risk scenarios & remedies Nr2: Use timestamps to protect the receiver against replay attacks, when an attacker intercepts the request and re-sends it in its entirety multiple times eio.guru/webhook-security-tw #WebhookSecurity #elasticio #DataSecurity

#Webhook security: Four risk scenarios & remedies Nr1: Use #HMAC to prevent tampering attacks on requests to the endpoint to make it look like it came from, say, Salesforce or NetSuite, and send falsified data eio.guru/webhook-security-tw #WebhookSecurity #elasticio #DataSecurity

New blog post: #WebhookSecurity: Four risk scenarios & how to secure #webhooks Request tampering, replay attacks or client impersonation are examples of common risk scenarios. Here are our available webhook security options. eio.guru/webhook-security-tw #applicationintegration