EUVD-2026-87655
GHSA-xphc-jppf-jrhm
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable, low-complexity, BUILDER-authenticated (PR:L) file write as root escalates beyond the app's authorization scope to full host compromise, so S:C with full C/I/A impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5DescriptionCVE.org
Budibase Server before 3.45.0 contains an arbitrary file write vulnerability in the PWA icon upload endpoint that extracts user-supplied ZIP archives without proper symlink validation. Attackers with BUILDER role can craft a malicious ZIP with leaf symlink entries followed by duplicate file entries to write arbitrary files as root, enabling remote code execution.
AnalysisAI
Remote code execution via arbitrary file write affects Budibase Server versions before 3.45.0. An authenticated attacker holding the BUILDER role can upload a crafted ZIP to the PWA icon upload endpoint that exploits missing symlink validation during extraction, using leaf symlink entries followed by duplicate file entries to overwrite arbitrary files as root. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated account with the BUILDER role in Budibase Server (PR:L) - not fully unauthenticated. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority vulnerability, distinguishing it from several sibling Budibase <3.45.0 CVEs that were confidentiality-only authz/IDOR issues. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patch by upgrading Budibase Server to version 3.45.0 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Budibase Server instances and identify any running versions prior to 3.45.0; immediately apply the vendor-released patch: 3.45.0 to all affected systems. …
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External POC / Exploit Code
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