CVE-2026-45061Public exploitNetwork attack vector

Authenticated SSRF via permissive plugin URL validation

Published May 27, 2026 · Updated May 27, 2026

SSRF in Budibase before 3.35.10 allows remote authenticated users with Global Builder access to reach internal services via plugin URLs. The POST /api/plugin urlUpload function accepts any URL containing .tar.gz anywhere, then passes it to fetchWithBlacklist without validating its scheme, host, or path. Default private-address blocking limits standalone reachability, but an empty BLACKLIST_IPS setting or an unchecked redirect exposes internal resources and metadata through server-side GET requests.

CVSS severity7.7
High
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

SSRF in Budibase before 3.35.10 allows remote authenticated users with Global Builder access to reach internal services via plugin URLs. The POST /api/plugin urlUpload function accepts any URL containing .tar.gz anywhere, then passes it to fetchWithBlacklist without validating its scheme, host, or path. Default private-address blocking limits standalone reachability, but an empty BLACKLIST_IPS setting or an unchecked redirect exposes internal resources and metadata through server-side GET requests.

The record

CVE
CVE-2026-45061
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Budibase
Product
Budibase
Classifications
CWE-184, CWE-918, CAPEC-664, T1552.005
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=< 3.35.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Budibase · Budibaseversion=< 3.35.10

Published CVSS scores

7.7Budibase GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
5.4Budibase GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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-184Incomplete List of Disallowed Inputs
CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1552.005Unsecured Credentials: Cloud 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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