CVE-2026-48768TypeBot: Unauthenticated arbitrary s3 object write in generate-upload-url via unsanitized fileName
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. 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.
- CVSS
- 9.3 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
- Weakness (CWE)
- CWE-22, CWE-79
- 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
- Jun 18, 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-fp7x-6pqh-vhvfx-refsource-confirm
- 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.