CVE-2026-39938 PUBLISHED

Cacti: Unauthenticated RCE on Graph Image

Assigner: GitHub_M
Reserved: 07.04.2026 Published: 24.06.2026 Updated: 25.06.2026

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have unauthenticated LFI through graph_theme and rrdtool IPC serialization hardening. This issue has been resolved in version 1.2.31.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Cacti
Product	cacti
Versions	Version < 1.2.31 is affected

References

https://github.com/Cacti/cacti/security/advisories/GHSA-rm7p-qcqm-x5m6
https://github.com/Cacti/cacti/commit/9871f0cef9af285398d558c9b3188d5977e01a04

Problem Types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE
CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE