CVE-2026-105863CWE-290CWE-915

CVE-2026-105863

Critical · published October 6, 2026

CVSS v3.1
9.4
EPSS
0%
Percentile
30.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.4 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
9.2 · 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
EPSS
0.00376 · 30.4th percentile
Weaknesses
CWE-290 · Authentication Bypass by Spoofing; CWE-915 · Improperly Controlled Modification of Dynamically-Determined Object Attributes
Published
2026-10-06T21:17Z
Affected products (35)
ProductVersionsFixed in
payloadcms/payload≥ 3.0.0, < 3.90.03.90.0
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References (3)
https://github.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239c · [email protected]https://github.com/payloadcms/payload/releases/tag/v3.90.0 · [email protected]https://github.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq · [email protected]
EPSS history
Timeline
  • 08 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 06 OCT 16:39Z
    Payload authentication token field handling issue
    cvelistv5