# CVE-2026-105852: Payload relationship-query authorization bypass

> CVE-2026-105852 (GitHub advisory GHSA-7c34-32v3-j575) is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9, classed as Missing Authorization (CWE-862), in payload (npm). Affected versions: < 3.90.0; >= 4.0.0-canary.0, < 4.0.0-canary.34. It is fixed in 3.90.0 or 4.0.0-canary.34, depending on the release line.

Canonical page: https://cveminer.com/vulnerabilities/CVE-2026-105852

| Field | Value |
| --- | --- |
| CVE | CVE-2026-105852 |
| GHSA | GHSA-7c34-32v3-j575 |
| Severity | Medium |
| CVSS 4.0 | 6.9 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N` (GitHub Advisory Database) |
| CWE | CWE-862 Missing Authorization |
| EPSS | 0.27% (higher than 18% of CVEs) |
| CISA KEV | Not listed |
| SSVC | exploitation none, automatable yes, technical impact partial |
| Published | 6 Oct 2026 |
| Modified | 6 Oct 2026 |

## Description

#### Impact

A readable collection could expose information about protected documents in a related collection.

**You are affected if:**

- You expose a readable collection with a relationship to a collection protected by access.read where constraints.

#### Patches

Users should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`.

#### Workarounds

There is no complete workaround. Upgrade Payload packages `>= 3.90.0` or `>= 4.0.0-canary.34`.

## Affected packages

| Package | Ecosystem | PURL | Vulnerable versions | Fixed in |
| --- | --- | --- | --- | --- |
| payload | npm | `pkg:npm/payload` | < 3.90.0; >= 4.0.0-canary.0, < 4.0.0-canary.34 | 3.90.0, 4.0.0-canary.34 |

## Fix commits

- Patch: https://github.com/payloadcms/payload/commit/94059cf4bc6170ce88453015c0c6551329ae3982
- Release: https://github.com/payloadcms/payload/commit/e10b60228b92b680663110ea2af431643bfc6126 (3.90.0)

## Questions

**What is the GHSA ID for CVE-2026-105852?**

GitHub tracks CVE-2026-105852 as GHSA-7c34-32v3-j575.

**What is the CVSS score of CVE-2026-105852?**

CVE-2026-105852 has a CVSS 4.0 base score of 6.9 (Medium), vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N.

**Which versions are affected by CVE-2026-105852?**

payload (npm): < 3.90.0; >= 4.0.0-canary.0, < 4.0.0-canary.34.

**How do I fix CVE-2026-105852?**

Upgrade to 3.90.0 or 4.0.0-canary.34, depending on the release line. The fix is in commit 94059cf.

**What is the Package URL (PURL) for CVE-2026-105852?**

The affected package's PURL is pkg:npm/payload.

**Is CVE-2026-105852 exploited in the wild?**

CISA's Known Exploited Vulnerabilities catalog doesn't list CVE-2026-105852. That means no confirmed exploitation has been catalogued, not that it is safe to leave unpatched. CISA's SSVC assessment rates exploitation as "none". EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18% of CVEs.

## References

- https://github.com/payloadcms/payload/commit/94059cf4bc6170ce88453015c0c6551329ae3982 (fix)
- https://github.com/payloadcms/payload/security/advisories/GHSA-7c34-32v3-j575 (advisory)
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105852.json (advisory)
- https://nvd.nist.gov/vuln/detail/CVE-2026-105852 (advisory)
- https://github.com/advisories/GHSA-7c34-32v3-j575 (advisory)
- https://github.com/payloadcms/payload (package)
- https://github.com/payloadcms/payload/releases/tag/v3.90.0

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Source: CVEminer (https://cveminer.com/vulnerabilities/CVE-2026-105852), compiled from OSV (GitHub advisory), GitHub Advisory Database, OSV (CVE record), CVE.org, CISA KEV catalog. OSV and GitHub Advisory Database content is licensed CC BY 4.0.