CVE-2026-48763

TypeBot is a chatbot builder tool. Versions prior to 3.17.0 expose a deprecated public upload endpoint at `GET /api/v1/typebots/{typebotId}/blocks/{blockId}/storage/upload-url` that accepts an attacker-controlled `filePath` and returns a presigned S3 `PUT` URL for that exact key. Because the endpoint only checks that the referenced typebot is public and that the referenced block is a file input block, an unauthenticated attacker who knows a valid public `typebotId` and `blockId` can request presigned upload URLs for arbitrary objects in the shared bucket, including `private/...` and other tenants' `public/...` paths. Version 3.17.0 fixes this issue.

CVSS 3.1

8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

EPSS

0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-25)

CWE

CWE-862

Published

2026-08-11

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

References

• https://github.com/baptisteArno/typebot.io/commit/7ae4c007d0987d2ca907b47e1b7418db62b8a157
• https://github.com/baptisteArno/typebot.io/pull/2459
• https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0
• https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-m7f5-3wcm-x2c4
• https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-m7f5-3wcm-x2c4

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