What is the CVSS score of CVE-2026-27198?

CVE-2026-27198 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Formwork are affected by CVE-2026-27198?

Formwork CMS versions 2.0.0-2.3.3 contain a critical authorization bypass vulnerability that could allow unauthorized users to create accounts with elevated privileges, potentially compromising…. A patch is available.

How to fix or mitigate CVE-2026-27198?

Within 24 hours: Audit account creation logs and review all recently created user accounts for unauthorized privilege grants. Within 7 days: Apply the available vendor patch to all Formwork instances running versions 2.0.0-2.3.3. Within 30 days: Conduct security review of user roles and permissions across all patched systems and reset credentials for any suspicious accounts created during the vulnerability window.

Formwork CVE-2026-27198

HIGH

Improper Privilege Management (CWE-269)

2026-02-21 security-advisories@github.com

GHSA-34p4-7w83-35g2

Privilege Escalation Formwork

8.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.8 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:04 vuln.today

Patch released

Mar 03, 2026 - 17:33 nvd

Patch available

CVE Published

Feb 21, 2026 - 06:17 nvd

HIGH 8.8

DescriptionGitHub Advisory

Formwork is a flat file-based Content Management System (CMS). In versions 2.0.0 through 2.3.3, the application fails to properly enforce role-based authorization during account creation. Although the system validates that the specified role exists, it does not verify whether the current user has sufficient privileges to assign highly privileged roles such as admin. As a result, an authenticated user with the editor role can create a new account with administrative privileges, leading to full administrative access and complete compromise of the CMS. This issue has been fixed in version 2.3.4.

AnalysisAI

Formwork CMS versions 2.0.0 through 2.3.3 fail to validate user privileges during account creation, allowing authenticated editors to create admin accounts and gain full CMS control. An attacker with editor-level access can exploit this authorization bypass to escalate privileges without restriction, completely compromising the application. A patch is available in version 2.3.4.

Technical ContextAI

Classified as CWE-269 (Improper Privilege Management). Affects Formwork. Formwork is a flat file-based Content Management System (CMS). In versions 2.0.0 through 2.3.3, the application fails to properly enforce role-based authorization during account creation. Although the system validates that the specified role exists, it does not verify whether the current user has sufficient privileges to assign highly privileged roles such as admin. As a result, an authenticated user with the editor role can create a new account with administrative privileges, leading to full ad