CVE-2026-50137: Budibase is an open-source low-code platform

Q: How do I fix CVE-2026-50137?

budibase: upgrade to 3.39.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-50137 being exploited?

CVE-2026-50137 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-50137 affect?

CVE-2026-50137 affects budibase. Severity is critical (CVSS 9.4). Budibase is an open-source low-code platform. Prior to 3.39.0, an anonymous attacker who knows or can enumerate a workspace id (app_...) and an S3-source datasource id (ds_...) can call this endpoint with no auth and obtain a 15-minute pre-

Q: How urgent is CVE-2026-50137?

Priority 52/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.4REMOTEUPGRADE

CVE-2026-50137 is a critical-severity flaw (CVSS 9.4) affecting budibase. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Budibase is an open-source low-code platform. Prior to 3.39.0, an anonymous attacker who knows or can enumerate a workspace id (app_...) and an S3-source datasource id (ds_...) can call this endpoint with no auth and obtain a 15-minute pre-signed PUT URL minted on the victim's IAM identity. The endpoint also returns the publicUrl so the attacker knows exactly where their PUT lands. Because bucket is attacker-controlled, the attacker can write to

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.4 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-06-26
Last modified	2026-06-30

Publisher (CNA): GitHub, Inc. · Vendor: budibase

Last updated 2026-06-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-26 21:16 UTCPublished CVE record published
2026-06-30 19:49 UTCUpdated Record last modified

budibase budibase UPGRADE

Affected: < 3.39.0

Fixed in: 3.39.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy budibase || rpm -q budibase || budibase --version

2. UPGRADE to 3.39.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade budibase

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade budibase

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-50137?

budibase: upgrade to 3.39.0. Exact commands for each OS are on this page.

Is CVE-2026-50137 being exploited?

CVE-2026-50137 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-50137 affect?

CVE-2026-50137 affects budibase. Severity is critical (CVSS 9.4). Budibase is an open-source low-code platform. Prior to 3.39.0, an anonymous attacker who knows or can enumerate a workspace id (app_...) and an S3-source datasource id (ds_...) can call this endpoint with no auth and obtain a 15-minute pre-

How urgent is CVE-2026-50137?

Priority 52/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-54350 CRITICAL 10.0 UPGRADE Budibase is an open-source low-code platform
CVE-2026-54353 HIGH 8.5 UPGRADE Budibase is an open-source low-code platform
CVE-2026-54352 CRITICAL 9.6 UPGRADE Budibase is an open-source low-code platform
CVE-2026-54351 HIGH 8.2 UPGRADE Budibase is an open-source low-code platform
CVE-2026-50136 HIGH 7.4 UPGRADE Budibase is an open-source low-code platform

References

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