CVE-2026-48063 WhiskeySockets CVE debrief

Who should care

Defenders responsible for WhatsApp Web and Baileys deployments should assess exposure and prioritize verification and updates to prevent message spoofing and app state corruption. Defenders should prioritize verifying and updating Baileys versions to prevent message spoofing and app state corruption, which can lead to unauthorized access and data manipulation.

Why it matters

Defenders should prioritize verifying and updating Baileys versions to prevent message spoofing and app state corruption, which can lead to unauthorized access and data manipulation.

• Message spoofing and injection of fake previous context
• App state corruption through fake key shares
• History sync spoofing and on-demand sync injection

Technical summary

A vulnerability in Baileys allows an attacker to send a malicious payload via the placeholderResendMessage and trigger a fake messages.upsert event with a fake message key and payload, enabling message spoofing and app state corruption through fake key shares and history sync spoofing. Baileys is a cocket-based TS/JavaScript API for WhatsApp Web. In versions prior to both 6.7.22 and 7.0.0-rc12, any Baileys session can be sent a malicious payload via the placeholderResendMessage and trigger a fake messages.upsert event with a fake message key and payload.

Defensive priority

Defenders should prioritize verifying and updating Baileys versions to prevent message spoofing and app state corruption.

Recommended defensive actions

• Verify Baileys version and update to 6.7.22 or 7.0.0-rc12 if necessary
• Monitor for suspicious messages and app state changes
• Implement additional security measures to prevent message spoofing and app state corruption
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its impact, and fixed versions 6.7.22 and 7.0.0-rc12. Baileys session can be sent a malicious payload via the placeholderResendMessage and trigger a fake messages.upsert event with a fake message key and payload. This allows anyone to spoof messages. The same exploit also allows an attacker to corrupt the app state sync system by sending fake key shares, and also allows for history sync spoofing which also serves the same problem, injecting fake previous context or on-

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.