What is CVE-2026-39899?

CVE-2026-39899 is a medium-severity vulnerability in Cacti, classified under Path Traversal. CVSS score: 5.3/10. Published 2026-06-24.

How severe is CVE-2026-39899?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Path Traversal in Cacti

CVE-2026-39899

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Path Traversal via filename parameter in package_import.php. This issue has been fixed in version 1.2.31.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-06-24 · last modified 2026-06-26.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Cacti — versions < 1.2.31

Weakness classification (CWE)

CWE-22 — Path Traversal

References

github.com/Cacti/cacti/security/advisories/GHSA-pr9x-34w8-4mf7 (Patch, Vendor Advisory)
github.com/Cacti/cacti/pull/6899 (Patch, Issue Tracking)

Frequently asked questions

What is CVE-2026-39899?: CVE-2026-39899 is a medium-severity vulnerability in Cacti, classified under Path Traversal. CVSS score: 5.3/10. Published 2026-06-24.
How severe is CVE-2026-39899?: Medium severity. CVSS v3 base score is 5.3 out of 10.