Is CVE-2026-51926 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-51926 being exploited in the wild.

How severe is CVE-2026-51926?

Informational severity, with a CVSS score of 5.3, published 9 July 2026.

Is there a fix for CVE-2026-51926?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-51926 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-51926?

Check whether you run docuForm FSM Server 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-2026-51926: docuForm FSM user enumeration in login.php

CVE-2026-51926 · Severity: info · CVSS 5.3 · Published 2026-07-09

docuForm FSM is a document and print management solution used to handle corporate printing workflows. A security flaw in the login interface allows unauthorized individuals to determine which usernames are valid by observing differences in how the server responds to login attempts. This information can be used by attackers to target specific accounts for password-guessing attacks or other malicious activities.

Technologies: docuForm FSM Server. Vendors: docuForm.

Quick answers

Is CVE-2026-51926 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-51926 being exploited in the wild.
How severe is CVE-2026-51926?: Informational severity, with a CVSS score of 5.3, published 9 July 2026.
Which products and versions are affected?: docuForm FSM Server 11.11c.
Is there a fix for CVE-2026-51926?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-51926 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-51926?: Check whether you run docuForm FSM Server 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.

Technical details

A user enumeration vulnerability exists in the authentication mechanism of docuForm FSM Client and Server version 11.11c. The flaw is located in the login.php component, where the application exhibits an observable response discrepancy (CWE-204) when processing login requests. A remote, unauthenticated attacker can differentiate between valid and invalid usernames based on variations in server responses. This reconnaissance can be leveraged to harvest valid account names, facilitating subsequent brute-force or credential stuffing attacks. The vulnerability was assigned a CVSS 3.1 base score of 5.3.

Affected products

docuForm GmbH FSM Client 11.11c
docuForm GmbH FSM Server 11.11c

Timeline

2026-07-01: disclosed: Initial researcher gist published by ZeroBreach GmbH
2026-07-09: advisory: CVE published to NVD dataset

References

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