Is CVE-2026-49442 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-49442 being exploited in the wild.

How severe is CVE-2026-49442?

Medium severity, with a CVSS score of 5.3, published 23 October 2026.

Is there a fix for CVE-2026-49442?

Yes: fixed in 1.2.31. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-49442 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-49442?

Check whether you run Cacti at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-49442: Cacti user enumeration via error messages

CVE-2026-49442 · Severity: medium · CVSS 5.3 · Published 2026-10-23

Cacti is an open-source framework for monitoring network performance and system health. A user enumeration vulnerability in versions before 1.2.31 allows attackers to determine which usernames exist on the system by observing subtle differences in login error messages. An attacker can systematically identify valid accounts, enabling targeted attacks such as brute-force password cracking or social engineering.

Technologies: Cacti. Vendors: Cacti.

Quick answers

Is CVE-2026-49442 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-49442 being exploited in the wild.
How severe is CVE-2026-49442?: Medium severity, with a CVSS score of 5.3, published 23 October 2026.
Which products and versions are affected?: Cacti before 1.2.31.
Is there a fix for CVE-2026-49442?: Yes: fixed in 1.2.31. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-49442 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-49442?: Check whether you run Cacti at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 1.2.31

Technical details

The authentication logic returns microscopically different error messages based on whether a username exists in the system: "Access Denied! Login failed" for existing users versus "Access Denied! Login Failed" for non-existent users, differing only in capitalization of "failed"/"Failed". This allows enumeration via straightforward comparison of server responses. The vulnerability affects all versions prior to 1.2.31, which contains the fix.

Affected products

Cacti Cacti before 1.2.31

Timeline

2026-10-23: disclosed
2026-05-26: patched

References

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