CVE-2026-62861Network attack vectorHinoki check available

Cross-tenant service interruption via unbound domain deletion

Published Aug 25, 2026 · Updated Aug 27, 2026

Authorization bypass in Typebot before 3.18.0 allows remote authenticated users to make another workspace's typebots unavailable. The handleDeleteCustomDomain.ts handler checks membership against a client-supplied workspaceId, then calls deleteDomainOnVercel(name) before confirming that name belongs to that workspace. A non-guest member and configured Vercel custom-domain integration are required; deletion removes the victim domain from the shared project and interrupts access without reading victim data.

CVSS severity6.4
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Authorization bypass in Typebot before 3.18.0 allows remote authenticated users to make another workspace's typebots unavailable. The handleDeleteCustomDomain.ts handler checks membership against a client-supplied workspaceId, then calls deleteDomainOnVercel(name) before confirming that name belongs to that workspace. A non-guest member and configured Vercel custom-domain integration are required; deletion removes the victim domain from the shared project and interrupts access without reading victim data.

The record

CVE
CVE-2026-62861
Published
Aug 25, 2026
Updated
Aug 27, 2026
Vendor
Typebot
Product
Typebot
Classifications
CWE-639, CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.18.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Typebot · Typebotversion=< 3.18.0

Published CVSS scores

6.4GitHub_MCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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