CVE-2026-22346
Published: 20 February 2026
Summary
CVE-2026-22346 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 26.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 RA-5 (Vulnerability Monitoring and Scanning) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-22346 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the WordPress plugin Slider Responsive Slideshow – Image slider, Gallery slideshow (slider-responsive-slideshow). It enables Object Injection and affects all versions from n/a through 1.5.4. The vulnerability has a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact.
An attacker with low privileges, such as an authenticated WordPress user, can exploit this vulnerability remotely over the network with low complexity and no user interaction required. Successful exploitation allows arbitrary object injection via untrusted deserialization, potentially leading to high confidentiality, integrity, and availability impacts, such as remote code execution or full compromise of the affected site.
The Patchstack advisory provides details on this PHP Object Injection vulnerability in plugin version 1.5.4: https://patchstack.com/database/Wordpress/Plugin/slider-responsive-slideshow/vulnerability/wordpress-slider-responsive-slideshow-image-slider-gallery-slideshow-plugin-1-5-4-php-object-injection-vulnerability?_s_id=cve.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-8244
Vulnerability details
Deserialization of Untrusted Data vulnerability in A WP Life Slider Responsive Slideshow – Image slider, Gallery slideshow slider-responsive-slideshow allows Object Injection.This issue affects Slider Responsive Slideshow – Image slider, Gallery slideshow: from n/a through <= 1.5.4.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Deserialization flaw in public-facing WordPress plugin directly enables remote exploitation by authenticated users leading to RCE/privilege escalation.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Flaw remediation requires timely patching of the deserialization vulnerability in the Slider Responsive Slideshow WordPress plugin to eliminate the object injection risk.
Information input validation ensures untrusted data is checked before deserialization, directly preventing object injection exploitation in the plugin.
Vulnerability monitoring and scanning identifies the presence of the vulnerable Slider Responsive Slideshow plugin versions, enabling proactive remediation.