CVE-2026-105863: Payload is a free and open source headless content management system

Q: How do I fix CVE-2026-105863?

payload: upgrade to 3.90.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-105863 being exploited?

CVE-2026-105863 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-105863 affect?

CVE-2026-105863 affects payload. Severity is critical (CVSS 9.4). 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 authenticati

Q: How urgent is CVE-2026-105863?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.4REMOTEUPGRADE

CVE-2026-105863 is a critical-severity flaw (CVSS 9.4) affecting payload. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.4 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-290, CWE-915
Published	2026-10-06
Last modified	2026-10-15

Publisher (CNA): GitHub, Inc. · Vendor: payloadcms

Last updated 2026-10-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-06 17:17 UTCPublished CVE record published
2026-10-15 00:09 UTCUpdated Record last modified

payloadcms payload UPGRADE

Affected: >= 3.0.0 and < 3.90.0 · 4.0.0 canary0 · 4.0.0 canary1 · 4.0.0 canary10 · 4.0.0 canary11 · 4.0.0 canary12 · 4.0.0 canary13 · 4.0.0 canary14

Fixed in: 3.90.0

Safe to downgrade to: a release before 3.0.0

1. Check installed version

npm ls payload

2. UPGRADE to 3.90.0

npm install payload@">=3.90.0"

3. If no update is available yet, DOWNGRADE to a release before 3.0.0

npm view payload versions npm install payload@"<3.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-105863?

payload: upgrade to 3.90.0. Exact commands for each OS are on this page.

Is CVE-2026-105863 being exploited?

CVE-2026-105863 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-105863 affect?

CVE-2026-105863 affects payload. Severity is critical (CVSS 9.4). 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 authenticati

How urgent is CVE-2026-105863?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-34750 MEDIUM 6.5 UPGRADE Payload is a free and open source headless content management system
CVE-2026-105846 MEDIUM 6.1 UPGRADE Payload is a free and open source headless content management system
CVE-2026-105847 MEDIUM 6.5 UPGRADE Payload is a free and open source headless content management system
CVE-2026-105868 HIGH 7.1 UPGRADE Payload is a free and open source headless content management system
CVE-2026-105848 CRITICAL 9.6 UPGRADE Payload is a free and open source headless content management system

References

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