High severity · published Oct 23, 2026
CVE-2026-39902
Cacti: Authenticated RCE on Data Input
New
7.2
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
cacti · Cacti
< 1.2.31 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39902
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39902
github.com
https://github.com/Cacti/cacti/pull/7112
github.com
https://github.com/Cacti/cacti/security/advisories/GHSA-c4qp-j9r9-fq24
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