CVE-2026-105863Payload authentication token field handling issue

Payload is a free and open source headless content management system. In versions after 3.0.0 and before 3.90.0, a custom field option that maps a field to a reserved authentication claim name can place unintended values in the authentication token issued at login. This issue is fixed in version 3.90.0.

9.2 CRITICALEPSS 0.54%Not in KEVNVD: Analyzed

Last updated: 2026-10-15 00:09 UTC

OverviewCVSS details

9.2CRITICALCVSS 4.0

Score source: GitHub_M (CNA)
NVD status: Analyzed
Published: Oct 6, 2026
Assigner: GitHub_M

Affected

payload (payloadcms)

Versions: >= 3.0.0, < 3.90.0 · >= 4.0.0-canary.0, < 4.0.0-canary.34

Exploitation

Public exploit: None listed
CISA KEV: Not listed
KEV due date: —
SSVC: Exploitation none · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

0.54%chance of exploitation in 30 days

Higher than 46.20% of CVEs

CVSS 4.0 · GitHub_M (CNA)

9.2Critical

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack vector: Network
Attack complexity: Low
Attack requirements: Present
Privileges required: None
User interaction: None
Confidentiality impact: High
Integrity impact: High
Availability impact: High
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): None

CVSS 3.1 · NVD

9.4Critical

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

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: Low

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.2	CRITICAL	4.0GitHub_M (CNA)	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.4	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Details

CVE ID: CVE-2026-105863
Status: Analyzed
Assigner (CNA): GitHub_M
Published: Oct 6, 2026
Last modified: 2026-10-15 00:09 UTC
Weaknesses: CWE-290 · Authentication Bypass by Spoofing
CWE-915 · Improperly Controlled Modification of Dynamically-Determined Object Attributes

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:26 UTC.