CVE-2026-72849Public exploitNetwork attack vectorHinoki check available

Account impersonation via unbound chat-link confirmation

Published Aug 13, 2026 · Updated Aug 17, 2026

Cross-site request forgery in Budibase Server before 3.40.0 allows remote authenticated users to impersonate same-tenant users. The confirmChatLinkSession controller accepts a leaked confirmationToken without binding it to the initiating user or validating CSRF, then links the logged-in victim to the attacker’s external chat identity. The victim must share the tenant, remain logged in, and submit the attacker’s form; subsequent agent operations inherit the victim’s permissions.

CVSS severity7.7
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Cross-site request forgery in Budibase Server before 3.40.0 allows remote authenticated users to impersonate same-tenant users. The confirmChatLinkSession controller accepts a leaked confirmationToken without binding it to the initiating user or validating CSRF, then links the logged-in victim to the attacker’s external chat identity. The victim must share the tenant, remain logged in, and submit the attacker’s form; subsequent agent operations inherit the victim’s permissions.

The record

CVE
CVE-2026-72849
Published
Aug 13, 2026
Updated
Aug 17, 2026
Vendor
Budibase
Product
Budibase Server
Classifications
CWE-285, CWE-352, CWE-345, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 17, 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=0 <3.40.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Budibase · Budibase Serverversion=0 <3.40.0

Published CVSS scores

7.7BudibaseCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-285Improper Authorization
CWE-352Cross-Site Request Forgery (CSRF)
CWE-345Insufficient Verification of Data Authenticity
T1189Drive-by Compromise

Public exploit references

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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