CVE-2026-73307Public exploitNetwork attack vector

Authenticated SSRF via unguarded attachment URL fetch

Published Aug 12, 2026 · Updated Aug 12, 2026

Server-side request forgery in Budibase before 3.39.4 allows remote authenticated users to read internal resources via attachment URLs. The uploadUrl function passes string attachment values from AI-generated rows to a bare server-side fetch and stores the response without fetchWithBlacklist validation. Builder access and the AI table-generation feature are required; exposed data can include internal service responses or cloud metadata.

CVSS severity4.9
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Budibase before 3.39.4 allows remote authenticated users to read internal resources via attachment URLs. The uploadUrl function passes string attachment values from AI-generated rows to a bare server-side fetch and stores the response without fetchWithBlacklist validation. Builder access and the AI table-generation feature are required; exposed data can include internal service responses or cloud metadata.

The record

CVE
CVE-2026-73307
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
Budibase
Product
Budibase
Classifications
CWE-918, T1552.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=< 3.39.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Budibase · Budibaseversion=< 3.39.4

Published CVSS scores

4.9GitHub CNACVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA: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 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-918Server-Side Request Forgery (SSRF)
T1552.005Cloud Instance Metadata API

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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