Payload CMS up to 3.89.x/4.0.0-canary.33 Registration first-register code injection

Summaryinfo

A vulnerability was found in Payload CMS Payload up to 3.89.x/4.0.0-canary.33. It has been classified as critical. Affected by this issue is the function first-register of the component Registration. This manipulation causes code injection. The identification of this vulnerability is CVE-2026-105858. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Payload CMS Payload up to 3.89.x/4.0.0-canary.33. It has been declared as critical. Affected by this vulnerability is the function first-register of the component Registration. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Payload is a free and open source headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, a crafted request to the public first-register operation can execute code remotely when local authentication is enabled and no initial user has been created. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-105858 since 10/06/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

Upgrading to version 3.90.0 or 4.0.0-canary.34 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• Payload CMS

Name

• Payload

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31
• 3.32
• 3.33
• 3.34
• 3.35
• 3.36
• 3.37
• 3.38
• 3.39
• 3.40
• 3.41
• 3.42
• 3.43
• 3.44
• 3.45
• 3.46
• 3.47
• 3.48
• 3.49
• 3.50
• 3.51
• 3.52
• 3.53
• 3.54
• 3.55
• 3.56
• 3.57
• 3.58
• 3.59
• 3.60
• 3.61
• 3.62
• 3.63
• 3.64
• 3.65
• 3.66
• 3.67
• 3.68
• 3.69
• 3.70
• 3.71
• 3.72
• 3.73
• 3.74
• 3.75
• 3.76
• 3.77
• 3.78
• 3.79
• 3.80
• 3.81
• 3.82
• 3.83
• 3.84
• 3.85
• 3.86
• 3.87
• 3.88
• 3.89
• 4.0.0-canary.0
• 4.0.0-canary.1
• 4.0.0-canary.2
• 4.0.0-canary.3
• 4.0.0-canary.4
• 4.0.0-canary.5
• 4.0.0-canary.6
• 4.0.0-canary.7
• 4.0.0-canary.8
• 4.0.0-canary.9
• 4.0.0-canary.10
• 4.0.0-canary.11
• 4.0.0-canary.12
• 4.0.0-canary.13
• 4.0.0-canary.14
• 4.0.0-canary.15
• 4.0.0-canary.16
• 4.0.0-canary.17
• 4.0.0-canary.18
• 4.0.0-canary.19
• 4.0.0-canary.20
• 4.0.0-canary.21
• 4.0.0-canary.22
• 4.0.0-canary.23
• 4.0.0-canary.24
• 4.0.0-canary.25
• 4.0.0-canary.26
• 4.0.0-canary.27
• 4.0.0-canary.28
• 4.0.0-canary.29
• 4.0.0-canary.30
• 4.0.0-canary.31
• 4.0.0-canary.32
• 4.0.0-canary.33

CPE 2.3info

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