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PatchSiren cyber security CVE debrief

CVE-2026-35392 patrickhener CVE debrief

A critical vulnerability was discovered in goshs, a SimpleHTTPServer written in Go. The vulnerability exists in the PUT upload functionality in httpserver/updown.go, where path sanitization is not performed. This allows an attacker to potentially upload files to arbitrary locations on the server. The vulnerability was fixed in version 2.0.0-beta.3.

Vendor
patrickhener
Product
goshs
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-06
Original CVE updated
2026-07-24
Advisory published
2026-04-06
Advisory updated
2026-07-24

Who should care

Users of goshs SimpleHTTPServer, particularly those using versions prior to 2.0.0-beta.3, should be aware of this vulnerability and take steps to mitigate it. This includes restricting access to the server, monitoring for suspicious activity, and upgrading to the latest version as soon as possible.

Technical summary

The vulnerability in goshs SimpleHTTPServer is due to a lack of path sanitization in the PUT upload functionality. This allows an attacker to potentially upload files to arbitrary locations on the server, leading to a critical vulnerability with a CVSS score of 9.8. The vulnerability was introduced in an earlier version of goshs and was fixed in version 2.0.0-beta.3.

Defensive priority

High

Recommended defensive actions

  • Upgrade to goshs version 2.0.0-beta.3 or later
  • Restrict access to the server to only trusted users
  • Monitor server logs for suspicious activity
  • Implement additional security measures such as file upload validation and sanitization

Evidence notes

The CVE record was published on 2026-04-06T21:16:21.013Z and last modified on 2026-07-24T21:10:00.143Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 9.8 and is classified as CRITICAL.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-35392 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-35392

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-35392 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-35392

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.