How severe is CVE-2026-41428?

CVE-2026-41428 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2026-41428 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41428?

CVE-2026-41428 affects Budibase. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41428?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-41428 have an EU (EUVD) identifier?

Yes. CVE-2026-41428 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25618.

When was CVE-2026-41428 published?

CVE-2026-41428 was published on 2026-04-24 and last updated on 2026-06-17.

CVE-2026-41428

CVE-2026-41428 is a critical-severity vulnerability in Budibase with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25618
Weakness: CWE-287
Affected product: Budibase
Published: 2026-04-24
Last modified: 2026-06-17

Description

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 because the regex /api/system/status/ matches in the query string portion of the URL. This vulnerability is fixed in 3.35.4.

Frequently asked questions

What is CVE-2026-41428?: 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 because the regex /api/system/status/ matches in the query string portion of the URL. This vulnerability is fixed in 3.35.4.
How severe is CVE-2026-41428?: CVE-2026-41428 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2026-41428 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41428?: CVE-2026-41428 affects Budibase. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41428?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-41428 have an EU (EUVD) identifier?: Yes. CVE-2026-41428 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25618.
When was CVE-2026-41428 published?: CVE-2026-41428 was published on 2026-04-24 and last updated on 2026-06-17.

References

https://github.com/Budibase/budibase/security/advisories/GHSA-8783-3wgf-jggf

Affected products (1)

cpe:2.3:a:budibase:budibase:*:*:*:*:*:*:*:*

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