CVE-2026-48763TypeBot has Arbitrary S3 Object Write in deprecated public upload endpoint via attacker-controlled filePath
Updated under an hour ago ()
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It affects baptisteArno typebot.io. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
baptisteArno typebot.io baptistearno:typebot.io (from the name) | before 3.17.0 | CNA record |
References
- https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-m7f5-3wcm-x2c4x-refsource-confirm
- https://github.com/baptisteArno/typebot.io/pull/2459x-refsource-misc
- https://github.com/baptisteArno/typebot.io/commit/7ae4c007d0987d2ca907b47e1b7418db62b8a157x-refsource-misc
- https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.