Critical severity · published Jun 24, 2026
CVE-2026-39938
Cacti: Unauthenticated RCE on Graph Image
9.8
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% 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, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39938
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39938
Patch
https://github.com/Cacti/cacti/commit/9871f0cef9af285398d558c9b3188d5977e01a04
Patch
https://github.com/Cacti/cacti/security/advisories/GHSA-rm7p-qcqm-x5m6
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