CVE-2026-50139— goshs: Share-link ?token=… redemption races past download limit
Quick assessment
Affected
patrickhener goshs
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.
goshs-labs goshs是goshs-labs组织的一个Web服务器软件。 goshs-labs goshs 2.1.0之前版本存在竞争条件问题漏洞，该漏洞源于ShareHandler在读取和更新下载计数时存在竞争条件问题，可能导致并发请求绕过下载限制，超出预期上限。
Possible ATT&CK Techniques 2 AI
T1565.001 · Stored Data Manipulation T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| patrickhener | goshs | < 2.1.0 |
affected |
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I. Basic Information for CVE-2026-50139
Vulnerability Information
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Vulnerability Title
goshs: Share-link ?token=… redemption races past download limit
Source: CVE Program / CVE List V5
Vulnerability Description
goshs is a SimpleHTTPServer written in Go. Prior to version 2.1.0, `ShareHandler` reads the share token's `DownloadLimit` under `RLock`, releases the lock, serves the file, then re-acquires the lock to increment the counter. Concurrent requests all read the same `Downloaded`/`DownloadLimit` snapshot, all pass the check, and all are served — exceeding the operator's intended cap. Version 2.1.0 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
goshs-labs goshs 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
goshs-labs goshs是goshs-labs组织的一个Web服务器软件。 goshs-labs goshs 2.1.0之前版本存在竞争条件问题漏洞，该漏洞源于ShareHandler在读取和更新下载计数时存在竞争条件问题，可能导致并发请求绕过下载限制，超出预期上限。
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 |
|---|---|---|---|---|
| patrickhener | goshs | < 2.1.0 | - |
|
II. Public POCs for CVE-2026-50139
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-50139 (1)
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V. Comments for CVE-2026-50139
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