CVE-2026-72859

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Source
https://cve.org/CVERecord?id=CVE-2026-72859
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72859.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-72859
Aliases
Published
2026-08-14T11:35:43.574Z
Modified
2026-08-16T03:48:43.567992830Z
Severity
  • 8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N CVSS Calculator
Summary
Budibase 3.39.4 before 3.40.0 Authorization Regression via S3 Presigned URL
Details

Budibase versions 3.39.4 before 3.40.0 contain an authorization regression in the S3 attachment upload endpoint that allows BASIC users to obtain S3 PutObject presigned URLs by sending POST requests to the attachments endpoint. The route was changed from a BUILDER permission check to a TABLE/WRITE check, which BASIC users hold by default. Attackers can specify arbitrary S3 buckets in the request body to generate presigned URLs for writing to any bucket accessible by the stored IAM credentials, enabling unauthorized file uploads.

Database specific 
{
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72859.json",
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/budibase/budibase

Affected ranges

Type
GIT
Repo
https://github.com/budibase/budibase
Events
Introduced
54b592e50af8cde47a815e6fe458e24be66a1c3a
Fixed
661fe55d609404d073eea86702e0bde7942c3f10
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "3.39.4"
        },
        {
            "fixed": "3.40.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

3.*
3.39.10
3.39.11
3.39.12
3.39.13
3.39.14
3.39.15
3.39.16
3.39.17
3.39.18
3.39.19
3.39.20
3.39.21
3.39.22
3.39.23
3.39.24
3.39.25
3.39.26
3.39.27
3.39.28
3.39.29
3.39.30
3.39.31
3.39.32
3.39.4
3.39.5
3.39.6
3.39.7
3.39.8
3.39.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72859.json"