PT-2026-27802 · Tumbler · Tumbler

Zebbern · Published 2026-03-25 · Updated 2026-04-01 · CVE-2026-26833

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions thumbler versions prior to 1.1.3

Description The software contains a flaw that allows for the injection of operating system commands. This occurs through the input, output, time, or size parameters within the thumbnail() function. The issue arises because user-supplied input is directly incorporated into a shell command string passed to child process.exec() without adequate sanitization or escaping. This lack of proper handling enables an attacker to execute arbitrary commands on the system.

Recommendations Update thumbler to version 1.1.3 or later.

Exploit

Fix

OS Command Injection

Code Injection

Weakness Enumeration

CWE-78

CWE-94

Related Identifiers

CVE-2026-26833

GHSA-MVHF-547C-H55R

Affected Products

Tumbler

References · 7

• 🔥 https://github.com/zebbernCVE/CVE-2026-26833 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-26833 · Security Note
• https://osv.dev/vulnerability/GHSA-mvhf-547c-h55r · Vendor Advisory
• https://github.com/mmahrous/thumbler/blob/master/lib/thumbler.js · Note
• https://github.com/mmahrous/thumbler · Note
• https://npmjs.com/package/thumbler · Note
• https://twitter.com/pulsepatchio/status/2039360630663082134 · Twitter Post