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CVE-2026-105863

CRITICAL
9.4NVD

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.

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EPSS · FIRST.org

0.38%probability of exploitation in the next 30 days

Higher than 30% of scored CVEs

EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-16, recomputed daily by FIRST.org.

In-depth analysis on cveo.tech

We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.

CVSS v3.1 Score

9.4
/ 10.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Information

Published
6 oct. 2026
Updated
15 oct. 2026
Status
Analyzed
Source
security-advisories@github.com

Affected products

payloadcms payload
Versions : 3.90.0, 4.0.0

Weaknesses (CWE)

CWE-290CWE-915

Similar CVEs

Other vulnerabilities of type CWE-290

…

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