Is CVE-2026-40758 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-40758 being exploited in the wild.

How severe is CVE-2026-40758?

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

Which products and versions are affected?

Elated-Themes Léonie <= 1.2.1.

Is there a fix for CVE-2026-40758?

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-2026-40758 attacked?

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

Am I affected by CVE-2026-40758?

Check whether you run Elated-Themes Léonie 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-2026-40758: Elated-Themes Léonie PHP Object Injection

Q: Is there a fix for CVE-2026-40758?

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-2026-40758 attacked?

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

Q: Am I affected by CVE-2026-40758?

Check whether you run Elated-Themes Léonie 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-2026-40758 · Severity: high · CVSS 8.1 · Published 2026-06-17

The Léonie theme for WordPress is vulnerable to a security flaw that allows unauthorized users to inject malicious code. This could lead to full website takeover, data theft, or the site being used to spread malware. Business operations may be disrupted if the site is defaced or taken offline by an attacker.

Vendors: Elated-Themes.

Quick answers

Is CVE-2026-40758 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-40758 being exploited in the wild.
How severe is CVE-2026-40758?: High severity, with a CVSS score of 8.1, published 17 June 2026.
Which products and versions are affected?: Elated-Themes Léonie <= 1.2.1.
Is there a fix for CVE-2026-40758?: 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-2026-40758 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-40758?: Check whether you run Elated-Themes Léonie 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 Léonie theme for WordPress (versions <= 1.2.1) due to improper deserialization of untrusted data (CWE-502). An unauthenticated remote attacker can exploit this by sending specially crafted input to the application. If a suitable Property-Oriented Programming (POP) chain is present in the environment, this can lead to arbitrary code execution, SQL injection, or full system compromise. The vulnerability is addressed in version 1.3.

Affected products

Elated-Themes Léonie <= 1.2.1

Timeline

2026-02-24: other: Reported by Denver Jackson
2026-04-20: advisory: Patchstack advisory published
2026-06-17: disclosed: NVD publication date

References

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