Concurrency Vulnerability in goshs SimpleHTTPServer by goshs-labs
CVE-2026-50139

5.9MEDIUM

Key Information:

Vendor

Patrickhener

Status
Goshs
Vendor
CVE Published:
18 August 2026

What is CVE-2026-50139?

The goshs SimpleHTTPServer, used for handling file downloads, has a concurrency vulnerability that allows multiple requests to bypass the intended download limit. Before version 2.1.0, the ShareHandler would read the download token's parameters while under a read lock, serve files, and then re-acquire the lock to update the download count. This process creates a race condition where concurrent requests may read the same count simultaneously, resulting in the intended download cap being exceeded. The vulnerability has been addressed in version 2.1.0.

Affected Version(s)

goshs < 2.1.0

References

https://github.com/goshs-labs/goshs/security/advisories/G...
x_refsource_CONFIRM

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.