Is CVE-2026-97278 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-97278 being exploited in the wild.

How severe is CVE-2026-97278?

High severity, with a CVSS score of 7.2, published 14 October 2026.

Which products and versions are affected?

WP SYNTEX Polylang through 3.8.9.

Is there a fix for CVE-2026-97278?

Yes: fixed in 3.8.10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-97278 attacked?

It is attacked over the network.

Am I affected by CVE-2026-97278?

Check whether you run WP SYNTEX Polylang 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-2026-97278: WP SYNTEX Polylang object injection in deserialization

CVE-2026-97278 · Severity: high · CVSS 7.2 · Published 2026-10-14

Polylang is a WordPress plugin that enables multilingual website support. A deserialization vulnerability allows attackers with editor-level access to inject malicious objects and execute arbitrary code on the web server, potentially leading to complete site compromise.

Technologies: WP SYNTEX Polylang. Vendors: WP SYNTEX.

Quick answers

Is CVE-2026-97278 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-97278 being exploited in the wild.
How severe is CVE-2026-97278?: High severity, with a CVSS score of 7.2, published 14 October 2026.
Which products and versions are affected?: WP SYNTEX Polylang through 3.8.9.
Is there a fix for CVE-2026-97278?: Yes: fixed in 3.8.10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-97278 attacked?: It is attacked over the network.
Am I affected by CVE-2026-97278?: Check whether you run WP SYNTEX Polylang 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.

How to fix

Fixed in: 3.8.10

Technical details

A PHP object injection vulnerability in Polylang's deserialization of untrusted data allows an authenticated attacker with editor privileges to craft malicious serialized objects. When deserialized, these objects can trigger arbitrary code execution through PHP's magic methods, giving an attacker server-level command execution.

Affected products

WP SYNTEX Polylang through 3.8.9

Timeline

2026-10-14: disclosed
2026-10-12: patched

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.