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CVE-2026-97278— WordPress Polylang plugin <= 3.8.9 - PHP Object Injection vulnerability

Quick assessment

Affected
WP SYNTEX Polylang
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WP SYNTEX Polylang 中存在反序列化不受信任数据漏洞，该漏洞允许对象注入。此问题影响 Polylang 从初始版本到 3.8.9 的所有版本。

CVSS 7.2 · High EPSS 0.44% · P37

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
WP SYNTEX Polylang ≤ 3.8.9 affected
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I. Basic Information for CVE-2026-97278

Vulnerability Information
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Vulnerability Title
WordPress Polylang plugin <= 3.8.9 - PHP Object Injection vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WP SYNTEX Polylang 0 ~ 3.8.9 -

II. Public POCs for CVE-2026-97278

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III. Intelligence Information for CVE-2026-97278

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Other References for CVE-2026-97278 (1)

IV. Related Vulnerabilities

Same product: Polylang
Same vendor: WP SYNTEX
Same weakness: CWE-502

V. Comments for CVE-2026-97278

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