Vulnerability · Published Jun 24, 2026 · Assigned by GitHub_M
CVE-2026-39938Cacti: Unauthenticated RCE on Graph Image
Critical 9.8
In plain English
A critical-severity path traversal in cacti from Cacti. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 46.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | cacti | no fix listed | DEBIAN-CVE-2026-39938 |
| Debian:13 | cacti | no fix listed | DEBIAN-CVE-2026-39938 |
| Debian:14 | cacti | 1.2.31+ds1-1 | DEBIAN-CVE-2026-39938 |
| Ubuntu:24.04:LTS | cacti | no fix listed | UBUNTU-CVE-2026-39938 |
| Ubuntu:25.10 | cacti | no fix listed | UBUNTU-CVE-2026-39938 |
| Ubuntu:26.04:LTS | cacti | no fix listed | UBUNTU-CVE-2026-39938 |
| Ubuntu:26.10 | cacti | no fix listed | UBUNTU-CVE-2026-39938 |
Affected products (as reported)
Weakness: CWE-22, CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/Cacti/cacti/security/advisories/GHSA-rm7p-qcqm-x5m6 x_refsource_CONFIRM
- https://github.com/Cacti/cacti/commit/9871f0cef9af285398d558c9b3188d5977e01a04 x_refsource_MISC