CVE-2026-70374

8.8 HIGHpublic exploit available

Published 2026-08-05 · Updated 2026-08-10

AI risk analysis

Summary: HashBrown CMS through 1.4.6 allows attackers to execute arbitrary system commands via crafted file uploads, due to improper handling of the thumbnail generation process.
Exploitability: Exploitation is relatively straightforward given the unescaped file path passed to the shell command. The attacker must have the ability to upload a file.
Blast radius: If exploited, this vulnerability could lead to complete compromise of the affected system, including data theft, service disruption, and unauthorized command execution.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to HashBrown CMS 1.4.7 or later.

rceos-command-injectionweb

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

HashBrown CMS through 1.4.6 contains an OS Command Injection vulnerability (CWE-78) in the media upload thumbnail generation routine. Media.generateThumbnail in src/Server/Entity/Resource/Media.js builds a temporary file path as 'thumbnail' + Path.extname(filename) and passes it, unescaped, into a shell command executed via AppService.exec ('convert ' + tempFile + ...).

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-78

Public exploit & PoC references

https://github.com/HashBrownCMS/hashbrown-cms

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.