CVE-2026-39902
Cacti: Authenticated RCE on Data Input
- Published
- Oct 23, 2026
- Updated
- Oct 23, 2026
- Assigning CNA
- GitHub_M
- Evidence observed
- Aug 26, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 34.2%
- Model date
- Oct 25, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Cacti is an open source performance and fault management framework. Prior to version 1.2.31, the prior blocklist ([;&| `$\\n\r]) omitted single-quote, double-quote, redirect operators, subshell parens and braces. An authenticated admin could save an input_string` containing single-quote, redirect operator, or subshell parens, and pass the check. This issue has been patched in version 1.2.31.
Sources
Proof-of-concept exploit for authenticated OS command injection (CWE-78) in Cacti ≤1.2.30, achieving remote code execution with CVSS 7.2.
Responsible use
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