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TI-2026-35856 Aliases CVE-2026-48494

TypeBot vulnerable to cross-typebot WhatsApp preview webhook resume via global `wa-preview-{phone}` session ids

Priority MEDIUM 64CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

TypeBot is a chatbot builder tool. In version 3.16.1, an authenticated user who has read access to any typebot can resume a WhatsApp preview webhook session that belongs to a different typebot by mixing an authorized `typebotId` and `blockId` and a foreign preview phone number tied to another preview session. The WhatsApp test-webhook handler authorizes the parent typebot first, but then resolves the preview chat session only by `wa-preview-{phone}`. As a result, an attacker can inject arbitrary webhook JSON into another workspace's WhatsApp preview session and advance its draft/unpublished flow without any access to the victim typebot. Version 3.17.0 patches the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00465 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
baptisteArnotypebot.io= 3.16.1—No fix listedCNA
  • typebot.io VendorbaptisteArno Affected = 3.16.1 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:typebot:typebot:*:*:*:*:*:*:*:*——baptisteArno
  • cpe:2.3:a:typebot:typebot:*:*:*:*:*:*:*:* Versions — — ·baptisteArno

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48494

References

Other 4

  • TI-2026-26091 TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF controls CVSS 3.1CRITICAL 10.0
  • TI-2026-36038 TypeBot: Unauthenticated arbitrary s3 object write in generate-upload-url via unsanitized fileName CVSS 3.1CRITICAL 9.3
  • TI-2026-44929 TypeBot: Arbitrary server file read via Send Email block attachment path CVSS 4.0HIGH 8.7
  • TI-2026-36035 TypeBot vulnerable to cross-workspace OAuth credential takeover in updateOAuthCredentials via missing object binding CVSS 3.1CRITICAL 9.9
  • TI-2026-35208 TypeBot vulnerable to CSV injection in result export CVSS 3.1CRITICAL 9.6
  • TI-2025-40055 Typebot May Expose AWS EKS Credentials via Server Side Request Forgery in Webhook Block CVSS 3.1CRITICAL 9.9
See all 35 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences