Cyber Resilience

CVE-2026-35392

CriticalPublic PoC

Published: 06 April 2026

Published
06 April 2026
Modified
09 April 2026
KEV Added
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Patch
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CVSS Score v3 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0068 47.7th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-35392 is a critical-severity Path Traversal (CWE-22) vulnerability in Goshs Goshs. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 47.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability details

goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.3, PUT upload in httpserver/updown.go has no path sanitization. This vulnerability is fixed in 2.0.0-beta.3.

CWE(s)
CWE-22

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1505.003 Web Shell Persistence
Adversaries may backdoor web servers with web shells to establish persistent access to systems.
attack.mitre.org →
Why these techniques?

Path traversal in unauthenticated PUT upload directly enables exploitation of the public-facing web server (T1190) to write arbitrary files including web shells (T1505.003).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

goshs
goshs
2.0.0 · ≤ 2.0.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-10 Information Input Validation
addresses: CWE-22

Validates pathnames and filenames to prevent traversal outside intended directories.

References