Is CVE-2026-34812 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34812 being exploited in the wild.

How severe is CVE-2026-34812?

Medium severity, with a CVSS score of 6.4, published 2 April 2026.

Which products and versions are affected?

Endian Firewall Community <= 3.3.25.

Is there a fix for CVE-2026-34812?

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-2026-34812 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-34812?

Check whether you run Endian Firewall Community 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-2026-34812: Endian Firewall stored XSS in proxypolicy.cgi mimetypes parameter

Q: Is there a fix for CVE-2026-34812?

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.

Q: How is CVE-2026-34812 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-34812?

Check whether you run Endian Firewall Community 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-2026-34812 · Severity: medium · CVSS 6.4 · Published 2026-04-02

Endian Firewall, a security appliance used to protect network perimeters, is vulnerable to a security flaw in its management interface. An authorized user with low-level access can inject malicious scripts into the system's proxy policy settings. These scripts are then executed in the browsers of other administrators who view the affected configuration page, potentially allowing the attacker to hijack administrative sessions or perform unauthorized actions.

Technologies: Endian Firewall Community. Vendors: Endian.

Quick answers

Is CVE-2026-34812 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34812 being exploited in the wild.
How severe is CVE-2026-34812?: Medium severity, with a CVSS score of 6.4, published 2 April 2026.
Which products and versions are affected?: Endian Firewall Community <= 3.3.25.
Is there a fix for CVE-2026-34812?: 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-2026-34812 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-34812?: Check whether you run Endian Firewall Community 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 stored cross-site scripting (XSS) vulnerability exists in Endian Firewall version 3.3.25 and earlier. The flaw is located in the '/cgi-bin/proxypolicy.cgi' component, which fails to properly neutralize user-supplied input in the 'mimetypes' parameter. An authenticated attacker with network access to the management interface can submit a crafted request containing malicious JavaScript. This script is permanently stored on the server and executes in the security context of any user (typically an administrator) who subsequently navigates to the proxy policy configuration page. This can lead to session hijacking, unauthorized configuration changes, or further escalation of privileges within the management console.

Affected products

Endian Firewall Community <= 3.3.25

Timeline

2026-04-02: disclosed
2026-04-02: advisory

References

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