CVE-2026-54352Public exploitNetwork attack vector

Arbitrary file read via PWA ZIP symlink

Published Jun 26, 2026 · Updated Jun 26, 2026

Path traversal in Budibase before 3.39.9 allows remote authenticated users to read server files through a crafted PWA ZIP upload. The icon validator checks only the resolved path string, then file opening follows an archive-created symlink outside the extraction directory and streams the target into MinIO. Workspace-builder access to one app is required; in stock self-hosted containers, readable deployment secrets enable global-administrator session forgery.

CVSS severity9.6
Critical
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Budibase before 3.39.9 allows remote authenticated users to read server files through a crafted PWA ZIP upload. The icon validator checks only the resolved path string, then file opening follows an archive-created symlink outside the extraction directory and streams the target into MinIO. Workspace-builder access to one app is required; in stock self-hosted containers, readable deployment secrets enable global-administrator session forgery.

The record

CVE
CVE-2026-54352
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Budibase
Product
Budibase
Classifications
CWE-22, CWE-59, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.39.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Budibase · Budibaseversion=< 3.39.9

Published CVSS scores

9.6GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-59Improper Link Resolution Before File Access ('Link Following')
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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