---
id: CVE-2026-97278
title: >-
  Deserialization of Untrusted Data vulnerability in WP SYNTEX Polylang polylang
  allows Object Injection.This issue affects Polylang: from n/a through 3.8.9.
summary: >-
  Deserialization of Untrusted Data vulnerability in WP SYNTEX Polylang polylang
  allows Object Injection.This issue affects Polylang: from n/a through 3.8.9.
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T14:26:59.367'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97278'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/polylang/vulnerability/wordpress-polylang-plugin-3-8-9-php-object-injection-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
ingestedAt: '2026-10-14T13:30:58.579Z'
---

## Overview

Deserialization of Untrusted Data vulnerability in WP SYNTEX Polylang polylang allows Object Injection.This issue affects Polylang: from n/a through 3.8.9.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.