by Kastro
Paper/Archive/CVE-2026-105863

CVE-2026-105863

payloadcms payload — Payload authentication token field handling issue

EPSS 0.4%CVSS 9.4
critical.is priorityof 100
35
CVSS 9.4 (NVD)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 31.6.316 × 206.3No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
payload>= 3.0.0, < 3.90.0–CNA
payload>= 4.0.0-canary.0, < 4.0.0-canary.34–CNA

Scores by source

NVD9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
GitHub_M (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jqrefgithub.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239crefgithub.com/payloadcms/payload/releases/tag/v3.90.0