CVE-2026-105863

CRITICALCVSS 9.2/10

Last modified

CVE-2026-105863 is a critical-severity vulnerability rated 9.2/10 on the CVSS scale. 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.

Description

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.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
payloadcmspayload>= 3.0.0, < 3.90.0; >= 4.0.0-canary.0, < 4.0.0-canary.34

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-105863?
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.
How severe is CVE-2026-105863?
CVE-2026-105863 has a CVSS score of 9.2/10 (CRITICAL severity).
How do I fix CVE-2026-105863?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

Are you affected by CVE-2026-105863?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST