What is CVE-2026-49442?

CVE-2026-49442 is a medium-severity vulnerability in Cacti, classified under Observable Response Discrepancy. CVSS score: 5.3/10. Published 2026-10-23.

How severe is CVE-2026-49442?

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

Vulnerability in Cacti

CVE-2026-49442

Cacti is an open source performance and fault management framework. Prior to version 1.2.31, a User Enumeration vulnerability allows an attacker to identify valid usernames on the Cacti service. When a user attempts to log in, the application returns slightly different error messages depending on whether the provided username exists in the system. When username exists on Cacti, in the response, they see Access Denied! Login failed. When it does not exist on Cacti, they see Access Denied! Login Failed. The only difference between the responses is the capitalization of the letter "f" in the word failed. This issue has been patched in version 1.2.31.

Published 2026-10-23 · last modified 2026-10-23.

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

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Cacti — versions < 1.2.31

Weakness classification (CWE)

CWE-204 — Observable Response Discrepancy

References

Frequently asked questions

What is CVE-2026-49442?: CVE-2026-49442 is a medium-severity vulnerability in Cacti, classified under Observable Response Discrepancy. CVSS score: 5.3/10. Published 2026-10-23.
How severe is CVE-2026-49442?: Medium severity. CVSS v3 base score is 5.3 out of 10.