RCE in Mmahrous Thumbler
CVE-2026-26833
thumbler through 1.1.2 allows OS command injection via the input, output, time, or size parameter in the thumbnail() function because user input is concatenated into a shell command string passed to child_process.exec() without proper sanitization or escaping.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.023 (81.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Mmahrous Thumbler
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Product)
- cve@mitre.org (Product)
- cve@mitre.org (Not Applicable)
- cve@mitre.org (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-26833?
- CVE-2026-26833 is a critical-severity vulnerability in Mmahrous Thumbler, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-03-25.
- How severe is CVE-2026-26833?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-26833 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.