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 before the request is sent, but the actual socket connection later performs a separate DNS lookup through node-fetch. Since the validated IPs are never pinned to the connection, an attacker-controlled hostname can return a public IP during validation and a private/internal IP during the real connection. This results in a non-blind SSRF primitive against internal services reachable from the Budibase host, including loopback, RFC1918 ranges, and cloud metadata endpoints. This vulnerability is fixed in 3.39.9.

CVSS v3 8.5 HIGH

8.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhf
https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhf

Configurations

No configuration.

History

29 Jun 2026, 14:16

Type	Values Removed	Values Added
References	~~() https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhf -~~	() https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhf -

26 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-26 21:16

Updated : 2026-06-29 18:51

NVD link : CVE-2026-54353

Mitre link : CVE-2026-54353

CVE.ORG link : CVE-2026-54353

JSON object : View

Products Affected

No product.

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

CWE-918

Server-Side Request Forgery (SSRF)

{"id": "CVE-2026-54353", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54353", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-29T13:17:27.293605Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.7, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "Budibase", "product": "budibase", "versions": [{"status": "affected", "version": "< 3.39.9"}]}]}], "published": "2026-06-26T21:16:35.417", "references": [{"url": "https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhf", "source": "security-advisories@github.com"}, {"url": "https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhf", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Undergoing Analysis", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-367"}, {"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "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 before the request is sent, but the actual socket connection later performs a separate DNS lookup through node-fetch. Since the validated IPs are never pinned to the connection, an attacker-controlled hostname can return a public IP during validation and a private/internal IP during the real connection. This results in a non-blind SSRF primitive against internal services reachable from the Budibase host, including loopback, RFC1918 ranges, and cloud metadata endpoints. This vulnerability is fixed in 3.39.9."}], "lastModified": "2026-06-29T18:51:46.540", "sourceIdentifier": "security-advisories@github.com"}