What’s Vulnerable › Vulnerabilities

CVE-2026-39938: Cacti: Unauthenticated RCE on Graph Image

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-06-26
• Weakness: CWE-22

Description

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.

Affected products

• cacti: before 1.2.31 — fixed in 1.2.31

How to fix

Upgrade to a fixed version: cacti 1.2.31. Check the vendor advisory for mitigations.

References

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

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