Is CVE-2026-78292 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-78292 being exploited in the wild.

How severe is CVE-2026-78292?

Critical severity, with a CVSS score of 9.8, published 27 August 2026.

Which products and versions are affected?

HashThemes Hash Form 1.4.1 and earlier.

Is there a fix for CVE-2026-78292?

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-2026-78292 attacked?

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

Am I affected by CVE-2026-78292?

Check whether you run HashThemes Hash Form 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-2026-78292: Hash Form PHP object injection vulnerability

CVE-2026-78292 · Severity: critical · CVSS 9.8 · Published 2026-08-27

Hash Form is a WordPress plugin used to create and manage forms on websites. An unauthenticated attacker can exploit a PHP object injection vulnerability to execute arbitrary code on the server, potentially compromising the entire website, stealing customer data, and deploying malware without requiring any login credentials.

Technologies: HashThemes Hash Form. Vendors: HashThemes.

Quick answers

Is CVE-2026-78292 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-78292 being exploited in the wild.
How severe is CVE-2026-78292?: Critical severity, with a CVSS score of 9.8, published 27 August 2026.
Which products and versions are affected?: HashThemes Hash Form 1.4.1 and earlier.
Is there a fix for CVE-2026-78292?: 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-2026-78292 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-78292?: Check whether you run HashThemes Hash Form 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

This vulnerability is a PHP object injection flaw in Hash Form versions 1.4.1 and earlier. The plugin fails to properly sanitize user-supplied input, allowing an unauthenticated attacker to inject malicious serialized PHP objects. By leveraging existing PHP gadget chains in WordPress or its dependencies, an attacker can achieve remote code execution on the web server. The vulnerability requires only network access and no authentication, making it trivial to exploit at scale. A fix is available in version 1.4.2 and later.

Affected products

HashThemes Hash Form 1.4.1 and earlier

Timeline

2026-08-25: disclosed
2026-08-27: advisory

References

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