CVE-2026-97278

WordPress Polylang plugin <= 3.8.9 - PHP Object Injection vulnerability

Published Oct 14, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Description
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

Vendor Solution

Update the WordPress Polylang plugin to the latest available version (at least 3.8.10).

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions polylang
Wp Syntex
Wp Syntex polylang
Vendors & Products Wordpress-extensions
Wordpress-extensions polylang
Wp Syntex
Wp Syntex polylang
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Deserialization of Untrusted Data vulnerability in WP SYNTEX Polylang polylang allows Object Injection.This issue affects Polylang: from n/a through 3.8.9.
Title WordPress Polylang plugin <= 3.8.9 - PHP Object Injection vulnerability
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Patchstack
Published
Updated
Oct 14, 2026, 2:00 PM
Reserved
Sep 24, 2026, 10:23 AM
Status
Deferred
Published
Oct 14, 2026, 1:17 PM
Modified
Oct 14, 2026, 2:26 PM