CVE-2026-45719Public exploitNetwork attack vector

CouchDB code execution via unvalidated calculation parameter

Published May 27, 2026 · Updated May 27, 2026

Code injection in Budibase before 3.38.1 allows remote authenticated users with Builder access to execute JavaScript in CouchDB. The V1 POST /api/views route passes the request body calculation value without Joi or SCHEMA_MAP validation, and viewBuilder interpolates it into a saved reduce definition that CouchDB evaluates. Builder permissions and a subsequent view query are required; execution remains inside the CouchDB sandbox but can read matching document values and return attacker-chosen data.

CVSS severity6.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Budibase before 3.38.1 allows remote authenticated users with Builder access to execute JavaScript in CouchDB. The V1 POST /api/views route passes the request body calculation value without Joi or SCHEMA_MAP validation, and viewBuilder interpolates it into a saved reduce definition that CouchDB evaluates. Builder permissions and a subsequent view query are required; execution remains inside the CouchDB sandbox but can read matching document values and return attacker-chosen data.

The record

CVE
CVE-2026-45719
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Budibase
Product
Budibase
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 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=< 3.38.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Budibase · Budibaseversion=< 3.38.1

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/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.

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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-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript

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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