What is CVE-2026-54353?

CVE-2026-54353 is a high-severity vulnerability in Budibase, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 8.5/10. Published 2026-06-26.

How severe is CVE-2026-54353?

High severity. CVSS v3 base score is 8.5 out of 10.

SSRF in Budibase

CVE-2026-54353

Budibase is an open-source low-code platform. Prior to 3.39.9, authenticated users with automation permissions can bypass Budibase's SSRF blacklist through DNS rebinding. The outbound fetch flow validates a hostname against the blacklist b…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.

Affected products

Budibase — versions < 3.39.9

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54353?: CVE-2026-54353 is a high-severity vulnerability in Budibase, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 8.5/10. Published 2026-06-26.
How severe is CVE-2026-54353?: High severity. CVSS v3 base score is 8.5 out of 10.