CVE-2026-39938

Cacti: Unauthenticated RCE on Graph Image

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

Cacti · cacti

CVSS v3.1 GITHUB

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

EPSS

0.69% chance of exploitation in the next 30 days, 52nd percentile

Published

2026-06-24

Updated

2026-06-26

Proof-of-concept exploits (2)

• kx00007/CVE-2026-399380★ · 2026-06-25
• Polosss/By-Poloss..-..CVE-2026-399380★ · 2026-06-26

Security advisories

• Cacti/cacti/security/advisories/GHSA-rm7p-qcqm-x5m6
• Cacti/cacti/commit/9871f0cef9af285398d558c9b3188d5977e01a04

References

• CVE Record
• NVD entry

Related

• CVE-2026-29041
• CVE-2026-35196
• CVE-2017-20251
• CVE-2026-10580
• CVE-2026-11912
• CVE-2026-12432