Is CVE-2026-40738 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-40738 being exploited in the wild.

How severe is CVE-2026-40738?

High severity, with a CVSS score of 8.1, published 17 June 2026.

Is there a fix for CVE-2026-40738?

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-2026-40738 attacked?

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

Am I affected by CVE-2026-40738?

Check whether you run Edge-Themes Eldon 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-2026-40738: Edge-Themes Eldon PHP object injection

CVE-2026-40738 · Severity: high · CVSS 8.1 · Published 2026-06-17

The Eldon theme for WordPress is vulnerable to a security flaw that allows unauthorized users to inject malicious code. This theme is used to design and manage the appearance of WordPress websites. If exploited, an attacker could potentially take control of the site, access sensitive data, or cause a complete service outage.

Vendors: Edge-Themes.

Quick answers

Is CVE-2026-40738 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-40738 being exploited in the wild.
How severe is CVE-2026-40738?: High severity, with a CVSS score of 8.1, published 17 June 2026.
Which products and versions are affected?: Edge-Themes Eldon <= 1.4.1.
Is there a fix for CVE-2026-40738?: 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-2026-40738 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-40738?: Check whether you run Edge-Themes Eldon 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 PHP Object Injection vulnerability exists in the Eldon WordPress theme (versions <= 1.4.1) due to the deserialization of untrusted data (CWE-502). An unauthenticated remote attacker can exploit this by submitting specially crafted input to a vulnerable component of the theme. If a suitable Property-Oriented Programming (POP) chain is present on the server, this can lead to various high-impact attacks including remote code execution, SQL injection, or arbitrary file deletion. The vulnerability is addressed in version 1.5.

Affected products

Edge-Themes Eldon <= 1.4.1

Timeline

2026-02-12: other: Reported by Denver Jackson
2026-04-16: disclosed: Vulnerability published by Patchstack
2026-06-17: advisory: CVE published in NVD

References

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