CVE-2026-54356

Budibase authenticated arbitrary S3 signed upload URL issuance via `/api/attachments/:datasourceId/url`

Budibase is an open-source low-code platform. Prior to 3.41.3, POST /api/attachments/:datasourceId/url in packages/server/src/api/routes/static.ts and packages/server/src/api/controllers/static/index.ts allows an authenticated published-app user with the BASIC role to supply attacker-controlled bucket and key values and obtain signedUrl and publicUrl values backed by stored S3 datasource credentials. This issue is fixed in version 3.41.3.

Affected

Budibase · budibase

CVSS v3.1 GITHUB

7.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

EPSS

0.35% chance of exploitation in the next 30 days, 27th percentile

Published

2026-08-17

Updated

2026-08-18

Proof-of-concept exploits (1)

• KovachVL/CVE-2026-543560★ · 2026-08-14

Security advisories

• advisories/GHSA-6x9p-4r67-5gjx

References

• CVE Record
• NVD entry

Related

• CVE-2026-55168