CVE-2026-27338
Published: 05 March 2026
Summary
CVE-2026-27338 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 29.8th 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 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2026-27338 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the AivahThemes Car Zone WordPress theme, which allows Object Injection. This issue affects Car Zone versions from n/a through 3.7 and was published on 2026-03-05.
The vulnerability can be exploited by an attacker with low privileges (PR:L) over the network (AV:N) with low attack complexity (AC:L) and no user interaction (UI:N), without changing scope (S:U). Successful exploitation can result in high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H), earning a CVSS v3.1 base score of 8.8.
Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/carzone/vulnerability/wordpress-car-zone-theme-3-7-deserialization-of-untrusted-data-vulnerability?_s_id=cve.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9611
Vulnerability details
Deserialization of Untrusted Data vulnerability in AivahThemes Car Zone carzone allows Object Injection.This issue affects Car Zone: from n/a through <= 3.7.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE describes a remotely exploitable deserialization/object injection flaw in a public-facing WordPress theme that requires only low privileges yet yields full confidentiality/integrity/availability impact, directly mapping to exploitation of public-facing applications for privilege escalation.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires timely identification, reporting, and remediation of flaws like the deserialization vulnerability in Car Zone theme versions <=3.7, directly preventing exploitation via patching.
Mandates validation of untrusted inputs to detect and reject malicious serialized data before deserialization, comprehensively addressing CWE-502 object injection.
Performs software integrity verification to detect changes from object injection exploits and prevent execution of injected malicious objects.