# CVE-2026-105847: Payload polymorphic join queries information disclosure

Source: https://junglewise.ai/threats/cve-2026-105847-payload-polymorphic-join-queries-could-disclose-hidden-fields  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-06. Updated: 2026-10-06  
License: CC BY 4.0 with a link back

CVE-2026-105847 · Severity: high · CVSS 4 · Published 2026-10-06

Payload is a headless CMS and backend framework that manages content collections and user queries. An authenticated user with query access could exploit polymorphic join filters to infer hidden or read-restricted field values, including password-reset tokens. This allows direct exposure of sensitive data that should remain protected from unauthorized access.

Technologies: [payload (npm)](https://junglewise.ai/threats/technologies/payload), [Payload CMS Payload](https://junglewise.ai/threats/technologies/payload-cms-payload). Vendors: [npm](https://junglewise.ai/threats/vendors/npm), [Payload CMS](https://junglewise.ai/threats/vendors/payload-cms).

## Quick answers

**Is CVE-2026-105847 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105847 being exploited in the wild.

**How severe is CVE-2026-105847?** High severity, with a CVSS score of 4, published 6 October 2026.

**Which products and versions are affected?** payload (npm) SEMVER:introduced=3.0.0,fixed=3.90.0; Payload CMS Payload 3.0.0 to 3.89.x; 4.0.0-canary.0 to 4.0.0-canary.33.

**Is there a fix for CVE-2026-105847?** Yes. payload (npm): upgrade to 3.90.0 or later. Until then: Restricting read access to sensitive collections reduces exposure but does not fully replace upgrading to a patched version. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-105847 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-105847?** Check whether you run payload (npm) or Payload CMS Payload at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- payload (npm): upgrade to 3.90.0 or later

  ```sh
  npm install payload@3.90.0
  ```


Restricting read access to sensitive collections reduces exposure but does not fully replace upgrading to a patched version.

## Technical details

The vulnerability is an information disclosure issue (CWE-200, CWE-639) in Payload's polymorphic join query handling. An authenticated attacker with query privileges can craft polymorphic join filters to infer values of hidden or read-restricted fields by observing query behavior, compromising confidentiality without requiring further privileges or user interaction. The attack vector is network-based and affects versions 3.0.0 through 3.89.x and 4.0.0-canary.0 through 4.0.0-canary.33.

## Affected products

- Payload CMS Payload 3.0.0 to 3.89.x; 4.0.0-canary.0 to 4.0.0-canary.33

## Identifiers

- CVE-2026-105847
- GHSA-fpww-c55p-cjv6

## Timeline

- 2026-09-18: disclosed
- 2026-10-06: advisory

## References

- [https://github.com/payloadcms/payload/security/advisories/GHSA-fpww-c55p-cjv6](https://github.com/payloadcms/payload/security/advisories/GHSA-fpww-c55p-cjv6)

## Related threats

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