# Payload vulnerable to API key disclosure through ordinary document reads

Advisory record · `GHSA-238x-w2j9-gwwr`

- **Identifiers:** `GHSA-238x-w2j9-gwwr` · `CVE-2026-105849`
- **State:** Confirmed
- **Severity:** CVSS 7.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-201](https://cwe.mitre.org/data/definitions/201.html) · [CWE-862](https://cwe.mitre.org/data/definitions/862.html)
- **Tags:** [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md) · [Broken access control](https://agentprime.io/advisories/tag/access-control.md)
- **Published:** 6 Oct 2026
- **Updated:** 6 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 6 Oct 2026, 16:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `payload` (npm): affected `>=3.0.0, <3.90.0 || >=4.0.0-canary.0, <4.0.0-canary.34`; fixed in `3.90.0`, `4.0.0-canary.34`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.7 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0030, the 23rd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 13:34 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-238x-w2j9-gwwr)

## Sources

- [GitHub Advisory Database: GHSA-238x-w2j9-gwwr](https://github.com/advisories/GHSA-238x-w2j9-gwwr)
- [OSV: GHSA-238x-w2j9-gwwr](https://osv.dev/vulnerability/GHSA-238x-w2j9-gwwr)
- <https://github.com/payloadcms/payload/security/advisories/GHSA-238x-w2j9-gwwr>
- <https://github.com/payloadcms/payload/commit/880d2e900be22cd66a9e939f2b3e702fa413180f>
- <https://github.com/payloadcms/payload>
- <https://github.com/payloadcms/payload/releases/tag/v3.90.0>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-238x-w2j9-gwwr>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-238x-w2j9-gwwr/>. Everything for agents: <https://agentprime.io/llms.txt>.