Is PHP affected by CVE-2026-28697?

A critical vulnerability in Craft CMS allows authenticated administrators to execute arbitrary code on affected systems, potentially enabling data theft, system compromise, or service disruption.

CVE-2026-28697

CRITICAL

2026-03-04 [email protected]

GHSA-v47q-jxvr-p68x

9.1

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:05 vuln.today

PoC Detected

Mar 05, 2026 - 10:37 vuln.today

Public exploit code

Patch Released

Mar 05, 2026 - 10:37 nvd

Patch available

CVE Published

Mar 04, 2026 - 17:16 nvd

CRITICAL 9.1

Description

Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, an authenticated administrator can achieve Remote Code Execution (RCE) by injecting a Server-Side Template Injection (SSTI) payload into Twig template fields (e.g., Email Templates). By calling the craft.app.fs.write() method, an attacker can write a malicious PHP script to a web-accessible directory and subsequently access it via the browser to execute arbitrary system commands. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1.

Analysis

RCE in Craft CMS before 4.17.0-beta.1/5.9.0-beta.1 via template injection for authenticated admins. PoC and patch available.

Remediation

Within 24 hours: Identify all systems running affected Craft CMS versions and assess administrator access logs for suspicious template modifications. Within 7 days: Apply vendor patches to upgrade to version 4.17.0-beta.1 or 5.9.0-beta.1 or later across all instances. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.5

CVSS: +46

POC: +20

CVE-2026-28697 vulnerability details – vuln.today

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CVE-2026-28697

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CVE-2026-28697

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Remediation

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External POC / Exploit Code