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CVE-2026-48768

TypeBot: Unauthenticated arbitrary s3 object write in generate-upload-url via unsanitized fileName

Published: Jun 17, 2026Updated: Jun 22, 2026 Sources: CVE List NVDCWE-22
9.3CRITICAL
NVD MITRE
EPSS Score
0.3%
Top 81.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

TypeBot is a chatbot builder tool. In versions 3.16.1 and earlier, POST /api/blocks/file-input/v3/generate-upload-url is unauthenticated and uses unsanitized fileName input to construct public/ S3 object keys, while issuing presigned PUT URLs that do not bind Content-Type. As a result, any anonymous visitor to a published bot with a file input can upload attacker-controlled HTML, SVG, or JS to attacker-chosen subpaths, including other tenants’ publicly served result paths, enabling arbitrary content hosting and potential stored XSS on the storage origin. ../ traversal is blocked by S3/MinIO canonicalization (signature mismatch), but forward-slash path injection is exploitable. This issue has been fixed in version 3.17.0.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:LI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-22CWE-79

Affected Products

typebot.iobaptisteArno
SaaS
Cloud & SaaS / saas-application
baptistearnoCloud & SaaSaka typebot.io

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

4 techniques
Collection
Discovery
Execution
Initial Access
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References

https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-fp7x-6pqh-vhvf
github.com
https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0
github.com

Timeline

Published
Jun 17, 2026
Last Updated
Jun 22, 2026

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