Cyber Resilience

CVE-2026-27417

CriticalRCE

Published: 05 March 2026

Published
05 March 2026
Modified
22 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0037 29.2th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-27417 is a critical-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 29.2th 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-2 (Flaw Remediation).

Deeper analysis

CVE-2026-27417 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the SeventhQueen Sweet Date WordPress theme, known as sweetdate. It enables Object Injection and affects all versions of the theme from n/a through those prior to 4.0.1.

The vulnerability carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating it can be exploited remotely by unauthenticated attackers with low attack complexity and no user interaction. Successful exploitation could result in high impacts to confidentiality, integrity, and availability.

The Patchstack advisory details the PHP Object Injection vulnerability in the Sweet Date theme and states that it was fixed in version 4.0.1. Mitigation involves updating affected WordPress sites to Sweet Date 4.0.1 or later.

OWASP Top 10 for Web (2025)

A08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability details

Deserialization of Untrusted Data vulnerability in SeventhQueen Sweet Date sweetdate allows Object Injection.This issue affects Sweet Date: from n/a through < 4.0.1.

CWE(s)
CWE-502

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

PHP object injection via unsafe deserialization in public-facing WordPress theme directly enables remote unauthenticated exploitation of the web application (T1190).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2025-62368Shared CWE-502
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CVE-2025-54014Shared CWE-502
CVE-2026-22505Shared CWE-502
CVE-2025-53078Shared CWE-502
CVE-2026-43633Shared CWE-502
CVE-2025-60039Shared CWE-502
CVE-2026-25429Shared CWE-502
CVE-2025-7697Shared CWE-502

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

SI-2 requires organizations to identify, report, and correct flaws like this deserialization vulnerability by updating the Sweet Date WordPress theme to version 4.0.1 or later.

RA-5 Vulnerability Monitoring and Scanning good match
detect

RA-5 mandates vulnerability scanning to identify the presence of CVE-2026-27417 in deployed Sweet Date theme versions prior to 4.0.1.

SI-10 Information Input Validation partial match
prevent

SI-10 enforces validation of untrusted inputs to mitigate risks from deserialization of untrusted data in the Sweet Date theme.

References