CVE-2026-54351

Description

Budibase is an open-source low-code platform. Prior to 3.39.9, the webhook trigger endpoint in Budibase is publicly accessible and passes the full HTTP request body into automation execution parameters. A mass assignment vulnerability in externalTrigger() allows an attacker to overwrite the internal appId property by including it in the webhook POST body. When the automation is processed asynchronously (the default path for webhooks without a collect step), the worker executes the attacker-defined automation in the context of the victim's workspace, granting full read/write access to the victim's database. This vulnerability is fixed in 3.39.9.

CVSS v3.1 Score

8.2

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0046

Probability of exploitation

0.37%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-915 CWE-915

Affected Products

Vendor	Product	Versions
budibase	budibase	< 3.39.9

References

Advisories & Patches

https://github.com/Budibase/budibase/security/advisories/GHSA-rgvg-3wpc-h44p https://github.com/Budibase/budibase/security/advisories/GHSA-rgvg-3wpc-h44p

Exploits

https://github.com/Budibase/budibase/security/advisories/GHSA-rgvg-3wpc-h44p https://github.com/Budibase/budibase/security/advisories/GHSA-rgvg-3wpc-h44p

Frequently Asked Questions

What is CVE-2026-54351? +

Budibase is an open-source low-code platform. Prior to 3.39.9, the webhook trigger endpoint in Budibase is publicly accessible and passes the full HTTP request body into automation execution parameters. A mass assignment vulnerability in externalTrigger() allows an attacker to overwrite the internal appId property by including it in the webhook POST body. When the automation is processed asynchronously (the default path for webhooks without a collect step), the worker executes the attacker-defined automation in the context of the victim's workspace, granting full read/write access to the victim's database. This vulnerability is fixed in 3.39.9. It has a CVSS v3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-54351? +

CVE-2026-54351 has a CVSS v3.1 score of 8.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0046, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-54351? +

CVE-2026-54351 affects products from budibase, specifically: budibase. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-54351? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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