CVE-2026-39397: @delmaredigital/payload-puc is missing authorization on /api/puck/* CRUD endpoints allows unauthenticated access to Puck-registered collections

Should you act?

Critical and remotely reachable

No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
• EPSS 0.6%, percentile 49: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 49% of all scored CVEs (low). EPSS is a probability, not a verdict.
• Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
• Only applies if your dependency tree includes @delmaredigital/payload-puck (npm) < 0.6.23, fixed in 0.6.23. Check your lockfile, including transitive dependencies.

What it is

@delmaredigital/payload-puck is a PayloadCMS plugin for integrating Puck visual page builder. Prior to 0.6.23, all /api/puck/ CRUD endpoint handlers registered by createPuckPlugin() called Payload's local API with the default overrideAccess: true, bypassing all collection-level access control. The access option passed to createPuckPlugin() and any access rules defined on Puck-registered collections were silently ignored on these endpoints. This vulnerability is fixed in 0.6.23.

From the GitHub advisory

Impact

All /api/puck/ CRUD endpoint handlers registered by createPuckPlugin() called Payload's local API with the default overrideAccess: true, bypassing all collection-level access control. The access option passed to createPuckPlugin() and any access rules defined on Puck-registered collections were silently ignored on these endpoints.

An unauthenticated remote attacker could:

- List all documents (including drafts) in any Puck-registered collection - Read any document by ID (including drafts) - Create new documents with arbitrary field values - Update any document (including bypassing field-level access rules) - Delete any document - Read version history and restore arbitrary versions

In typical installations, the affected scope is the collection backing the website's pages (default slug: pages). For most users this means an attacker could read, modify, create, or delete every page on the website — including unpublished drafts and version history.

Weakness type: CWE-862.

Product: @delmaredigital/payload-puck (npm) · Assigned by: GitHub_M · Published: 2026-04-07

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Privileges required: none (no login)
• User interaction: none
• Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
• CISA SSVC assessment: exploitation none, automatable yes, technical impact total.
• FIRST EPSS (model of 2026-10-21): 0.61% probability of exploitation activity in the next 30 days; percentile 49.

Timeline

• 2026-04-07 — CVE record last updated
• 2026-04-07 — CVE record published by GitHub_M
• 2026-04-08 — GitHub-reviewed advisory GHSA-65w6-pf7x-5g85 published (critical)

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vulnerability records

1. GitHub Advisory GHSA-65w6-pf7x-5g85 github.com
2. CVE.org record CVE-2026-39397 cve.org
3. NVD entry CVE-2026-39397 nvd.nist.gov

Other references from the CVE record and advisory

1. github.com github.com
2. github.com github.com
3. github.com github.com

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