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CVE-2026-30961— Gokapi's File Request MaxSize Limit Bypassed via Multi-Chunk Upload

Quick assessment

Affected
Forceu Gokapi
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.

Gokapi是Marc Bulling个人开发者的一个轻量级的自托管Firefox发送替代方案。 Gokapi 2.2.4之前版本存在安全漏洞，该漏洞源于分块上传完成路径未验证总文件大小，可能导致攻击者绕过大小限制上传超大文件。

CVSS 4.3 · Medium EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

T1567 · Exfiltration Over Web Service
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I. Basic Information for CVE-2026-30961

Vulnerability Information
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Vulnerability Title
Gokapi's File Request MaxSize Limit Bypassed via Multi-Chunk Upload
Source: CVE Program / CVE List V5
Vulnerability Description
Gokapi is a self-hosted file sharing server with automatic expiration and encryption support. Prior to 2.2.4, the chunked upload completion path for file requests does not validate the total file size against the per-request MaxSize limit. An attacker with a public file request link can split an oversized file into chunks each under MaxSize and upload them sequentially, bypassing the size restriction entirely. Files up to the server's global MaxFileSizeMB are accepted regardless of the file request's configured limit. This vulnerability is fixed in 2.2.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Gokapi 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gokapi是Marc Bulling个人开发者的一个轻量级的自托管Firefox发送替代方案。 Gokapi 2.2.4之前版本存在安全漏洞，该漏洞源于分块上传完成路径未验证总文件大小，可能导致攻击者绕过大小限制上传超大文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Forceu Gokapi < 2.2.4 -

II. Public POCs for CVE-2026-30961

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III. Intelligence Information for CVE-2026-30961

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Vendor Advisories for CVE-2026-30961 (1)

Vendor Pages for CVE-2026-30961 (1)

Same Patch Batch · Forceu · 2026-03-13 · 3 CVEs total

CVE-2026-30955 6.5 MEDIUM Gokapi vulnerable to DoS in E2E Metadata Parser
CVE-2026-30943 4.1 MEDIUM Gokapi has Privilege Escalation in File Replace

IV. Related Vulnerabilities

Same product: Gokapi
Same vendor: Forceu
Same weakness: CWE-770

V. Comments for CVE-2026-30961

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