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CVE-2026-100682— Budibase Server before 3.45.0 Arbitrary File Write via ZIP Symlink

Quick assessment

Affected
budibase server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Budibase 服务器 3.45.0 之前的版本存在任意文件写入漏洞。在 PWA 图标上传端点中，系统解压用户提供的 ZIP 归档文件时，未能正确验证符号链接（symlink）。拥有 BUILDER 角色的攻击者可以构造一个恶意的 ZIP 文件，其中包含指向深层目录的符号链接条目，后跟重复的文件条目，从而以 root 权限写入任意文件，进而实现远程代码执行。

CVSS 8.8 · High EPSS 0.57% · P45
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I. Basic Information for CVE-2026-100682

Vulnerability Information
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Vulnerability Title
Budibase Server before 3.45.0 Arbitrary File Write via ZIP Symlink
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
budibase server 0 ~ 3.45.0 -

II. Public POCs for CVE-2026-100682

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III. Intelligence Information for CVE-2026-100682

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Vendor Advisories for CVE-2026-100682 (1)

Other References for CVE-2026-100682 (1)

Same Patch Batch · budibase · 2026-09-26 · 9 CVEs total

CVE-2026-100686 8.1 HIGH Budibase before 3.45.0 Cross-Workspace Privilege Escalation via POST /api/global/groups/:g
CVE-2026-100684 8.1 HIGH Budibase Server 3.41.0 before 3.45.0 Authentication Bypass via OIDC
CVE-2026-100680 8.1 HIGH Budibase before 3.45.0 Arbitrary Local File Read via OpenAPI Import
CVE-2026-100683 8.0 HIGH Budibase before 3.45.0 SQL Injection via column-rename DDL
CVE-2026-100685 7.7 HIGH Budibase before 3.45.0 Information Disclosure via Chat Links
CVE-2026-100688 6.5 MEDIUM Budibase server before 3.45.0 Cross-Tenant Information Disclosure
CVE-2026-100687 5.5 MEDIUM Budibase Server before 3.45.0 Credential Exposure via External Table Broadcast
CVE-2026-100681 5.4 MEDIUM Budibase before 3.45.0 SSRF and OAuth Token Exfiltration via Teams Webhook

IV. Related Vulnerabilities

Same product: server
Same vendor: budibase
Same weakness: CWE-22

V. Comments for CVE-2026-100682

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