What is CVE-2026-70374?

CVE-2026-70374 is a high-severity vulnerability in Hashbrowncms Hashbrown-Cms, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-05.

How severe is CVE-2026-70374?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Hashbrowncms Hashbrown-Cms

CVE-2026-70374

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 + ...).

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.010 (60.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Hashbrowncms Hashbrown-cms — versions 0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)

Frequently asked questions

What is CVE-2026-70374?: CVE-2026-70374 is a high-severity vulnerability in Hashbrowncms Hashbrown-Cms, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-05.
How severe is CVE-2026-70374?: High severity. CVSS v3 base score is 8.8 out of 10.