How severe is CVE-2026-24042?

CVE-2026-24042 has a CVSS 3.x base score of 9.4, 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 high, and availability low.

Is CVE-2026-24042 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24042?

CVE-2026-24042 affects Appsmith. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-24042?

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-2026-24042 have an EU (EUVD) identifier?

Yes. CVE-2026-24042 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4221.

When was CVE-2026-24042 published?

CVE-2026-24042 was published on 2026-01-22 and last updated on 2026-06-17.

CVE-2026-24042

CVE-2026-24042 is a critical-severity vulnerability in Appsmith with a CVSS 3.x base score of 9.4. 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-862.

Key facts

Severity: Critical (CVSS 3.x base score 9.4)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4221
Weakness: CWE-862
Affected product: Appsmith
Published: 2026-01-22
Last modified: 2026-06-17

Description

Appsmith is a platform to build admin panels, internal tools, and dashboards. In versions 1.94 and below, publicly accessible apps allow unauthenticated users to execute unpublished (edit-mode) actions by sending viewMode=false (or omitting it) to POST /api/v1/actions/execute. This bypasses the expected publish boundary where public viewers should only execute published actions, not edit-mode versions. An attack can result in sensitive data exposure, execution of edit‑mode queries and APIs, development data access, and the ability to trigger side effect behavior. This issue does not have a released fix at the time of publication.

Frequently asked questions

What is CVE-2026-24042?: Appsmith is a platform to build admin panels, internal tools, and dashboards. In versions 1.94 and below, publicly accessible apps allow unauthenticated users to execute unpublished (edit-mode) actions by sending viewMode=false (or omitting it) to POST /api/v1/actions/execute. This bypasses the expected publish boundary where public viewers should only execute published actions, not edit-mode versions. An attack can result in sensitive data exposure, execution of edit‑mode queries and APIs, development data access, and the ability to trigger side effect behavior. This issue does not have a released fix at the time of publication.
How severe is CVE-2026-24042?: CVE-2026-24042 has a CVSS 3.x base score of 9.4, 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 high, and availability low.
Is CVE-2026-24042 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24042?: CVE-2026-24042 affects Appsmith. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-24042?: 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-2026-24042 have an EU (EUVD) identifier?: Yes. CVE-2026-24042 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4221.
When was CVE-2026-24042 published?: CVE-2026-24042 was published on 2026-01-22 and last updated on 2026-06-17.

References

https://github.com/appsmithorg/appsmith/security/advisories/GHSA-j9qq-4fj9-9883

Affected products (1)

cpe:2.3:a:appsmith:appsmith:*:*:*:*:*:*:*:*

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