CVE-2026-41428: Budibase is an open-source low-code platform

Q: How do I fix CVE-2026-41428?

budibase: upgrade to 3.35.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-41428 being exploited?

CVE-2026-41428 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-2026-41428 affect?

CVE-2026-41428 affects budibase. Severity is critical (CVSS 9.1). Budibase is an open-source low-code platform. Prior to 3.35.4, the authenticated middleware uses unanchored regular expressions to match public (no-auth) endpoint patterns against ctx.request.url. Since ctx.request.url in Koa includes the q

Q: How urgent is CVE-2026-41428?

Priority 51/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-41428 is a critical-severity flaw (CVSS 9.1) 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 3.35.4, the authenticated middleware uses unanchored regular expressions to match public (no-auth) endpoint patterns against ctx.request.url. Since ctx.request.url in Koa includes the query string, an attacker can access any protected endpoint by appending a public endpoint path as a query parameter. For example, POST /api/global/users/search?x=/api/system/status bypasses all authentication b

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	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-04-24
Last modified	2026-06-17

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

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-24 20:16 UTCPublished CVE record published
2026-06-17 10:46 UTCUpdated Record last modified

budibase budibase UPGRADE

Affected: < 3.35.4

Fixed in: 3.35.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.35.4 (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-2026-41428?

budibase: upgrade to 3.35.4. Exact commands for each OS are on this page.

Is CVE-2026-41428 being exploited?

CVE-2026-41428 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-2026-41428 affect?

CVE-2026-41428 affects budibase. Severity is critical (CVSS 9.1). Budibase is an open-source low-code platform. Prior to 3.35.4, the authenticated middleware uses unanchored regular expressions to match public (no-auth) endpoint patterns against ctx.request.url. Since ctx.request.url in Koa includes the q

How urgent is CVE-2026-41428?

Priority 51/100. 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-2026-50137 CRITICAL 9.4 UPGRADE Budibase is an open-source low-code platform

References

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