CVE-2026-48763
Unauthenticated generation of S3 presigned PUT URLs enabling cross-tenant uploads.
Is CVE-2026-48763 being exploited?
Not confirmed. CVE-2026-48763 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.39% probability of exploitation in the next 30 days.
How severe is CVE-2026-48763?
CVE-2026-48763 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-48763?
Yes. A fix has been recorded for CVE-2026-48763. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-48763 affect?
CVE-2026-48763 affects TypeBot <3.17.0, API: GET /api/v1/typebots/{typebotId}/blocks/{blockId}/storage/upload-url, Shared S3 bucket (presigned PUT URLs). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-48763?
Upgrade to TypeBot 3.17.0 immediately; or disable endpoint and restrict S3 key access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can obtain presigned S3 PUT URLs for arbitrary keys, allowing cross-tenant file upload/overwrite and data injection.
Immediate action required
- affected< 3.17.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.