CVE-2026-72855Public exploitNetwork attack vector

Authenticated SSRF via unpinned DNS re-resolution

Published Aug 13, 2026 · Updated Aug 14, 2026

SSRF in Budibase Server before 3.40.0 allows remote authenticated users to access blocked internal HTTP services via DNS rebinding. OpenAPI import validates a hostname before a separate raw fetch, while REST execution passes a pinned Node agent to undici, which ignores it and re-resolves through its dispatcher. Builder-level access and control of a rebinding hostname are required; responses from loopback or private services can expose data and permit limited writes.

CVSS severity8.4
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Budibase Server before 3.40.0 allows remote authenticated users to access blocked internal HTTP services via DNS rebinding. OpenAPI import validates a hostname before a separate raw fetch, while REST execution passes a pinned Node agent to undici, which ignores it and re-resolves through its dispatcher. Builder-level access and control of a rebinding hostname are required; responses from loopback or private services can expose data and permit limited writes.

The record

CVE
CVE-2026-72855
Published
Aug 13, 2026
Updated
Aug 14, 2026
Vendor
Budibase
Product
Budibase Server
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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

8.4VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
8.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/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 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 exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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